Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 1 of 68

ATTORNEYS FOR APPELLANT

William J. Webster

Carla V. Garino

Webster Legal, LLC

Westfield, Indiana

ATTORNEYS FOR APPELLEE

Curtis T. Hill, Jr.

Attorney General of Indiana

Ellen H. Meilaender

Supervising Deputy Attorney General

Indianapolis, Indiana 

I N T H E

COURT OF APPEALS OF INDIANA

Katelin Eunjoo Seo,

Appellant-Defendant,

v.

State of Indiana,

Appellee-Plaintiff.

August 21, 2018

Court of Appeals Case No. 

29A05-1710-CR-2466

Appeal from the Hamilton 

Superior Court

The Honorable Steven R. Nation, 

Judge

Trial Court Cause No. 

29D01-1708-MC-5640

Mathias, Judge.

[1] Smartphones are ubiquitous in modern life. See Riley v. California, ___ U.S. ___, 

134 S. Ct. 2473, 2484 (2014) (“[M]odern cell phones, . . . are now such a 

pervasive and insistent part of daily life that the proverbial visitor from Mars 

might conclude they were an important feature of human anatomy.”). The 
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amount of personal information contained on a typical smartphone is 

astounding: photographs, contacts, emails, text messages, not to mention the 

personal information that is contained in widely used smartphone social-media 

applications such as Facebook, Instagram, LinkedIn, or Twitter. United States v. 

Wurie, 728 F.3d 1, 7 (1st Cir. 2013) (noting that “[I]nformation [contained on a 

modern cell phone] is, by and large, of a highly personal nature: photographs, 

videos, written and audio messages (text, email, and voicemail), contacts, 

calendar appointments, web search and browsing history, purchases, and 

financial and medical records.”). Indeed, a modern smartphone is a 

“telephone” only as a small part of its many functions. It is more accurately 

described as a mobile computing and communications device with abilities that 

were dreams in the realm of science fiction only a few decades ago.

[2] Thus, when the State seeks to search a smartphone, it seeks to inquire into far 

more than “old-fashioned” information physically contained on paper. In truth, 

nearly every smartphone contains data stored and arranged in such a way as to 

uniquely reveal the innermost thoughts of its owner. A smartphone is a trove of 

extremely personal information that is almost always embarrassing, and 

potentially, incriminating. A modern smartphone, with its central purpose of

connecting its owner to the Internet and its ability to store and share incredible 

amounts of information in “the Cloud” of online storage, is truly as close as 

modern technology allows us to come to a device that contains all of its owner’s 

conscious thoughts, and many of his or her unconscious thoughts, as well. So, 

when the State seeks to compel a person to unlock a smartphone so that it may 
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search the phone without limitations, the privacy implications are enormous 

and, arguably, unique. Cf. United States v. Otero, 563 F.3d 1127, 1132 (10th Cir. 

2009) (“The modern development of the personal computer and its ability to 

store and intermingle a huge array of one’s personal papers in a single place 

increases law enforcement’s ability to conduct a wide-ranging search into a 

person’s private affairs[.]”). 

[3] In the present case, the Hamilton Superior Court issued a search warrant 

ordering Katelin Eunjoo Seo (“Seo”) not only to produce her smartphone,

1 but 

also to permit the State to search Seo’s smartphone without limitation. Seo

refused to unlock the phone, citing her right against self-incrimination under the 

Fifth Amendment to the Constitution of the United States (“Fifth 

Amendment,” and “Constitution,” respectively), and the State sought to hold 

her in contempt for her refusal to unlock the phone. The trial court agreed with 

the State and held Seo in contempt for refusing to unlock her phone. Seo 

appeals and argues that the trial court’s order requiring her to unlock her phone 

violated the guarantee against self-incrimination contained in the Fifth 

Amendment. We agree. Accordingly, we reverse the trial court’s order finding 

Seo in contempt and remand for proceedings consistent with this opinion, with 

 

1 The dissent claims that we “unnecessarily” hold that “a passcode is the equivalent of a combination to a 

wall safe,” because the trial court did not ask Seo to reveal her password. Slip op., infra, at 55–56. The trial 

court’s warrant and order, however, require Seo to unlock, and thereby decrypt, her phone. And the only 

way to unlock and decrypt the phone is for Seo to enter her passcode into the phone. As explained infra, we 

conclude that there is no meaningful difference between forcing Seo to reveal her passcode and forcing her to 

input her passcode into her phone and then handing it over to the police. Thus, we do not share the dissent’s 

belief that our holding is unnecessary.
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specific guidelines as to the reasonable specificity that prosecutors should show 

concerning the information sought in such an instance. 

Facts and Procedural History

[4] In July 2017, Seo contacted the Hamilton County Sheriff’s Department 

(“HCSD”) claiming to be a victim of a rape committed by D.S. HCSD 

Detective Bill Inglis (“Detective Inglis”) investigated Seo’s allegations. As part 

of his investigation, Seo allowed Detective Inglis to view her smartphone, an 

Apple iPhone 7 Plus. With Seo’s consent, Inglis also did a “forensic download”

of the contents of Seo’s iPhone and returned it to her. Tr. p. 6. 

[5] After reviewing the contents of Seo’s iPhone, Inglis decided not to pursue any 

charges against D.S. Instead, based on the contents of the phone and D.S.’s 

statements, Inglis began to investigate Seo for stalking and harassing D.S.

When questioned, D.S. explained to Inglis that he received numerous calls and 

text messages from Seo’s phone, up to thirty per day. At some point, however, 

the phone number of the sender of these messages and calls began to change 

daily, yet the conversations were linked and apparently sent by the same 

person. Inglis suspected that Seo was using a third-party application to change 

her phone number.2

 

2 Detective Inglis mentioned two apps that could be used to change the caller’s cellphone number: Google 

Voice and “Pinger,” Tr. p. 8, the latter apparently a reference to the “Text Free Calling” app by Pinger, Inc., 

both of which are available for download on the Apple App Store for iPhones. 
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[6] On July 19, 2017, the State charged Seo with Level 6 felony stalking, Class A 

misdemeanor intimidation, Class A misdemeanor theft, and Class B 

misdemeanor harassment. The information alleged that Seo had stalked and 

harassed D.S. with the intent to get him to either marry her or impregnate her 

against his will. The police arrested Seo at her place of employment that same 

day. At the time of her arrest, Seo had in her possession a bag that contained an

iPhone and an iPad tablet. Seo admitted that the phone was hers but claimed 

that the iPad belonged to someone else. The iPhone appeared to be the same 

one she had earlier provided to the police, and the number for the iPhone 

matched that of the phone used to make the earlier calls and send the text 

messages to D.S. The police took possession of Seo’s iPhone at this time. 

[7] On July 21, 2017, the State charged Seo under a new cause with thirteen counts 

of Class A misdemeanor invasion of privacy, alleging that Seo violated a 

protective order preventing her from contacting D.S. On August 8, 2017, the 

State applied for and was granted a warrant to search Seo’s iPhone. Because 

Seo’s iPhone is locked, the State also sought that same day a warrant and order 

compelling her to unlock her iPhone so that police could search it. The trial 

court issued a warrant providing in relevant part: 

WHEREAS, William Inglis of the Hamilton County Sheriff’s 

Department has given sworn probable cause testimony for 

issuance of a Search Warrant. Based on that testimony, the Court 

finds probable cause exists for issuance of this Search Warrant. 

You are, therefore, authorized and ordered in the name of the 

State of Indiana, with necessary and proper assistance, in the 
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daytime or nighttime, to search the property located at and 

identified as: 

5. for the purpose of searching items described in the sworn 

evidence, to wit: 

That Katelin Eunjoo Seo be compelled to unlock (via 

biometric fingerprint passcode, password or otherwise) the I 

Phone [sic] 7 plus with serial number ************ and 

cellular phone number ******* pursuant to Indiana Code 35-

33-5-11(a) and that if she fails to comply with this order, that 

she be subject to the contempt powers of the court. 

You are further authorized to deliver any of said items to an 

appropriate facility for analysis and comparison against other 

evidence gathered in the investigation.

Appellant’s App. p. 49.3

[8] On August 15, 2017, Seo, now represented by counsel, notified the State that 

she would not comply with the order to unlock the phone. Accordingly, the 

State filed a motion that same day for a rule to show cause why Seo should not 

be held in contempt. The trial court held a hearing on the matter on September 

21, 2017. At the conclusion of the hearing, the trial court entered an order 

finding Seo in contempt, which reads in relevant part as follows: 

1. The State requested and the Court granted a search warrant 

for the contents of the phone at issue (iPhone 7 plus bearing 

serial number ************, previously connected with 

number **********) under cause number 29D01-1708-MC-

 

3 The probable cause affidavit supporting the issuance of this search warrant is not in the record before us.
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 7 of 68

5624, and the Court took Notice of such cause for the purpose 

of ruling in this cause.

2. The State requested and the Court granted a search warrant

compelling the Defendant to unlock the phone by biometric 

fingerprint access, keycode, password, passcode, or otherwise 

under cause number 29D01-1708-MC-5640.

3. The Court finds that the statutory requirements as found in 

Ind. Code 35-33-5-11 have been satisfied in this cause.

4. The act of unlocking the phone does not rise to the level of 

testimonial self-incrimination that is protected by the Fifth 

Amendment of the United States Constitution or by Article 1, 

Section 14 of the Indiana Constitution.

5. Katelin Eunjoo Seo is found to be in contempt of Court for 

failure to abide by the warrant issued under this cause: 29D0l1708-MC-5640.

IT IS THEREFORE ORDERED, ADJUDGED AND 

DECREED as follows:

1. That Katelin Eunjoo Seo is ORDERED incarcerated in the 

Hamilton County Jail and she shall surrender herself at the 

Hamilton County Jail no later than 4:30 p.m. on today’s date, 

Friday, September 22 unless and until she purges herself of 

Contempt of Court.

2. That in order to purge herself of Contempt of Court, Katelin 

Eunjoo Seo is ORDERED to unlock the phone at issue and to 

(1) disable the passcode function on the phone, or (2) to 

change the passcode on the phone to 1234.

Appellant’s App. pp. 6–7 (emphases in original). 
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[9] The same day that the trial court entered its contempt order, Seo filed a motion 

to stay the contempt sanction pending appeal, which the trial court granted on 

September 25, 2017. Seo filed a notice of appeal on October 20, 2017.4

I. Standard of Review

[10] The determination of whether a party is in contempt of court is a matter within 

the sound discretion of the trial court. Jones v. State, 847 N.E.2d 190, 199 (Ind. 

Ct. App. 2006), trans. denied. However, here, the question is whether forcing 

Seo to unlock her phone or reveal her password is a violation of her Fifth 

Amendment right against self-incrimination, and this is a pure question of law 

that is reviewed de novo. See United States v. Neighbors, 590 F.3d 485, 492 (7th 

Cir. 2009) (holding that the question of whether voice identification based on 

in-court proceedings for a criminal defendant violated his Fifth Amendment 

right against self-incrimination was a question of law reviewed de novo); Conn v. 

State, 89 N.E.3d 1093, 1097 (Ind. Ct. App. 2017) (noting that pure questions of 

law are reviewed de novo), trans. denied. 

II. Encryption

[11] Because this case involves the technical aspects of locking and unlocking a 

modern smartphone, and the current caselaw considers the method of 

unlocking that information somewhat dispositive as to whether unlocking can 

 

4 We held oral argument on this case on May 1, 2018. We commend counsel for the quality of their written 

and oral advocacy.
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be coerced, a brief overview of the underlying technology is in order. One law 

review note succinctly summarizes encryption as follows: 

Encryption is the process of concealing information, and all such 

systems have several similar characteristics. At its most basic 

level, encryption involves transforming information or data, 

called “plaintext,” into a coded form that cannot be understood 

by outsiders. The process is performed according to the 

encryption algorithm, a set of rules that governs how the 

plaintext is transformed. While this can be as simple as 

substituting each letter in a message with a corresponding 

number, modern encryption algorithms often consist of a

complex series of mathematical functions. Regardless of the 

manner of encryption, the result is that the plaintext is made 

unintelligible to outsiders.

Andrew J. Ungberg, Protecting Privacy Through a Responsible Decryption Policy, 22 

Harv. J.L. & Tech. 537, 540 (2009) (citation footnotes omitted).5 Another 

commentator further explains:

When . . . [data] is encrypted using current technology an 

“encryption key” is required to decrypt the message. An 

encryption key is basically a very long string of numbers that is 

stored in the encryption software’s memory. The software users 

do not have to remember this long number; instead [they] can 

enter a more easily remembered password or passphrase, which 

in turn activates the encryption key. When the government seeks

to compel an ordinary citizen to turn over the means by which he 

 

5

For a more detailed look at encryption and possible ways to defeat encryption, see Orin S. Kerr and Bruce 

Schneier, Encryption Workarounds (March 22, 2017), 106 Geo. L.J. 989 (2018).
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can decrypt the data, the disclosure order will typically compel 

him to turn over his password rather than the encryption key.

Michael Wachtel, Give Me Your Password Because Congress Can Say So, 14 U. Pitt. 

J. Tech. L. & Pol’y 44, 48 (2013) (citations and quotations omitted). 

III. iPhone Security6

[12] The iPhone 7 Plus at issue here is locked, and therefore, the contents of the 

phone are encrypted. See Apple, iOS Security p. 14 (Jan. 2018).7 That is, even if 

the digital contents of the phone’s storage could be extracted from the phone, 

those contents would still be undecipherable without also unencrypting the 

contents. 

[13] The contents of the iPhone 7 series are encrypted with a strong 256-bit AES 

encryption key.8Instead of requiring each user to memorize a 256-bit key, the 

key is instead itself encrypted with a “system key” unique to each phone, plus 

 

6 The discussion that follows is focused on the smartphone at issue in this case, an iPhone 7 Plus. However, 

the substance of the discussion also applies to smartphones manufactured under other brand names, 

generally, and, in some instances, specifically.

7

https://www.apple.com/business/docs/iOS_Security_Guide.pdf

8 AES stands for “Advanced Encryption System.” Realnetworks, Inc. v. DVD Copy Control Ass’n, 641 F. Supp. 

2d 913, 927 (N.D. Cal. 2009). A 256-bit AES encryption key is almost unfathomably strong because there are 

2

256 possible keys. 2256 is approximately equivalent to 1077. By way of comparison, scientists estimate that 

there are 1086 (one-hundred thousand quadrillion vigintillion) atoms in the entire universe. See John Carl 

Villanueva, How Many Atoms Are There in the Universe? (Apr. 22, 2018),

https://www.universetoday.com/36302/atoms-in-the-universe/. Thus, guessing a 256-bit key is effectively 

impossible. See Kerr & Schneier, supra at 994 (noting that cracking a 256-bit key is “beyond the reach of any 

foreseeable computer technology,” thus rendering a “brute force” repeated guessing of the key “effectively 

impossible.”). But the implementation of an encryption system may contain errors that allow someone to 

bypass this seemingly unbreakable security. Id. at 1005–06. 
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the user-chosen passcode. Id. When a user enters her passcode, this is combined 

with the system key to unlock the “File System Key,” which is used to decipher 

the contents of the phone.9Id.

[14] Thus, each time a user unlocks her phone, she is enabling the phone to recreate 

all of the information on the phone, taking what was once indistinguishable 

from random noise and deciphering it into the requested data. See Jeffrey Kiok, 

Missing the Metaphor: Compulsory Decryption and the Fifth Amendment, 24 B.U. 

Pub. Int. L.J. 53, 59 (2015) (discussing the process of on-the-fly encryption and 

decryption). 

 

9 More precisely, a file written to the storage on the iPhone can be of one of four different “Data Protection 

Classes,” as assigned by the app that creates it. Apple, iOS Security p. 15. Files that are in the “Complete 

Protection” class are protected by a class key derived from the user passcode and the phone’s unique 

identifier (“UID”). “Shortly after the user locks a device . . . the decrypted class key is discarded, rendering 

all data in this class inaccessible until the user enters the passcode again or unlocks the device using Touch 

ID or Face ID.” Id. Files created in the “Protected Unless Open” class are those that need to be written even 

when the device is locked, such as an email attachment downloading in the background. Id. at 16. Such files 

are encrypted using a per-file asymmetric key, and the public key is stored with the encrypted per-file key. Id. 

When a file in this class is closed, the per-file key is wiped from memory. Id. “To open the file again, the 

shared secret is re-created using the Protected Unless Open class’s private key and the file’s ephemeral public 

key, which are used to unwrap the per-file key that is then used to decrypt the file.” Id. 

The third class is the “Protected Until First User Authentication.” Id. “This class behaves in the same way as 

Complete Protection, except that the decrypted class key isn’t removed from memory when the device is 

locked.” Id. Instead, the key is removed only on reboot. Id. “The protection in this class has similar properties 

to desktop full-volume encryption, and protects data from attacks that involve a reboot.” Id. This is the 

default class for all third-party app data not otherwise assigned to a Data Protection class. 

The final class is “No Protection,” and is protected only with the UID. Id. “Since all the keys needed to 

decrypt files in this class are stored on the device, the encryption only affords the benefit of fast remote wipe.” 

Id. However, “[i]f a file isn’t assigned a Data Protection class, it is still stored in encrypted form (as is all data 

on an iOS device).” 

In the present case, there is nothing in the record to indicate which app created the information sought by the 

State, nor under which Data Protection class the data sought falls within. 
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[15] Randomly guessing the passcode (a “brute force” attack) can be automated and 

accomplished at mind-boggling speeds by modern computers. See Paul Roberts, 

Update: New 25 GPU Monster Devours Passwords in Seconds, Security Ledger (Dec. 

4, 2012, 19:12) (reporting on a password-guessing cluster of computer graphics 

cards that can guess 348 billion password hashes per second).

10 But such brute 

force attacks are difficult because of the iPhone’s software security features, 

which incrementally increases the time allowed between such guesses. Apple, 

iOS Security p. 15. This eventually allows only one guess every hour, or, 

depending upon the settings of the phone, wipes the contents of the phone after 

ten incorrect guesses, making repeated guessing of the password impractical.

[16] Thus, if the police want or need to gain access to an iPhone, the cooperation of 

its owner is practically a necessity. But if the owner of the smartphone is 

unwilling to cooperate with the police, then the police are faced with fewer 

options. One of these options has been to attempt to bypass the encryption via 

some error in the implementation of the encryption. The other has been to use 

the power of the courts to compel the owner to unlock the phone. This case 

presents the question of when the owner of the phone may refuse to cooperate 

with the police based upon her rights not to incriminate herself found in the 

U.S. Constitution.

 

10 https://securityledger.com/2012/12/new-25-gpu-monster-devours-passwords-in-seconds/
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IV. The Fifth Amendment and Testimony

[17] Seo claims that the trial court’s order compelling her to unlock her phone11

violates her right under the Fifth Amendment12 not to be a witness against 

herself. This appears to be a case of first impression in Indiana. 

[18] The Self-incrimination Clause of the Fifth Amendment provides that “[n]o 

person . . . shall be compelled in any criminal case to be a witness against 

himself[.]” U.S. Const. amend. V. This constitutional safeguard is applicable to 

state criminal cases by way of the Fourteenth Amendment. Bleeke v. Lemmon, 6 

N.E.3d 907, 925 (Ind. 2014) (citing Withrow v. Williams, 507 U.S. 680, 688–89 

(1993)). The Fifth Amendment prohibits compelled testimony that is 

incriminating. Id. (citing Hiibel v. Sixth Judicial Dist. Ct. of Nev., 542 U.S. 177, 

190 (2004)). Thus, the government cannot force someone to provide a 

communication that is “testimonial” in character. In re Search Warrant 

 

11 We take judicial notice that Seo’s iPhone 7 Plus is equipped with what Apple refers to as “Touch ID,” a 

biometric fingerprint sensor that can be used to unlock the phone, instead of a typed-in password. See iPhone 

7 Technical Specifications, https://www.apple.com/iphone-7/specs/ (last visited August 13, 2018); Apple, 

iOS Security p. 7. The record is unclear as to which method of security Seo chose to use. See Tr. p. 9 

(describing the phone as “locked,” but not indicating which method could be used to unlock it). However, 

the search warrant applied to either method. See Appellant’s App. p. 49 (order compelling Seo to unlock her 

phone “via biometric fingerprint, passcode, password, or otherwise[.]”).

12 Seo has yet to make any Fourth Amendment claim regarding the validity of the search warrant. Given the 

early procedural posture of this case, we express no opinion as to the validity of the search warrant issued by 

the trial court, as that issue has yet to be litigated in the first instance. We also note that Seo does not make 

any separate argument under the anti-self-incrimination provision of the Indiana Constitution, other than to 

mention the Indiana Constitution in her conclusion. We therefore focus our analysis solely on the Fifth 

Amendment of the Constitution of the United States. See Holloway v. State, 69 N.E.3d 924, 931 (Ind. Ct. App. 

2017) (noting that a defendant cannot invoke analysis of an issue under the Indiana Constitution without a 

separate and independent analysis of the claim), trans. denied. 
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Application for [redacted text], 279 F.Supp.3d 800, 803 (N.D. Ill. 2017) (citing 

United States v. Hubbell, 530 U.S. 27, 34 (2000)). 

[19] The Fifth Amendment privilege against self-incrimination reflects our nation’s 

“fierce ‘unwillingness to subject those suspected of crime to the cruel trilemma 

of self-accusation, perjury or contempt,’ that defined the operation of . . . [Great 

Britain’s] Star Chamber, wherein suspects were forced to choose between 

revealing incriminating private thoughts or forsaking their oath by committing 

perjury.” Pennsylvania v. Muniz, 496 U.S. 582, 596 (1990) (quoting Doe v. United 

States, 487 U.S. 201, 212 (1988) (“Doe II”)). Indeed, “[t]he Fifth Amendment 

privilege against compulsory self-incrimination . . . protects ‘a private inner 

sanctum of individual feeling and thought and proscribes state intrusion to 

extract self-condemnation.’” Id. (quoting United States v. Nobles, 422 U.S. 225, 

233 (1975)). 

[20] To date, the United States Supreme Court has issued no opinion directly 

addressing whether compelling a person to unlock a phone or provide a 

passcode is testimonial.

13 However, in a series of cases, the Court has explored 

whether certain acts of producing documents can be testimonial for Fifth 

Amendment purposes. Importantly, these cases span more than a century and

 

13 The Court has held that there is no Fifth Amendment problem with compelling a person to do something 

that displays a physical characteristic that might be incriminating. See Hubbell, 530 U.S. at 35. Among the 

compelled physical characteristics that have been held to be non-testimonial are fingerprints. Schmerber v. 

California, 384 U.S. 757, 763–65 (1966)); United States v. Hook, 471 F.3d 766, 773–74 (7th Cir. 2006). This 

reasoning is outdated and ironic when compared with the current, heightened, “state of the art” electronic 

security provided by physical characteristics such as facial recognition and retinal scans.
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contain important developments during times when the internet and 

smartphones did not exist.

[21] In the late 1800s, the Court held in Boyd v. United States, 116 U.S. 616, 633 

(1886), that “[w]e have been unable to perceive that the seizure of a man’s 

private books and papers to be used in evidence against him is substantially 

different from compelling him to be a witness against himself.”

14 In Fisher v. 

United States, 425 U.S. 391 (1976), however, the Court backed away from its 

earlier holding in Boyd, but never expressly overruled its prior holding. See 

Fisher, 425 U.S. at 407 (stating that “[s]everal of Boyd’s express or implicit 

declarations have not stood the test of time.”). Still, in Schmerber v. California, 

384 U.S. 757, 763–64 (1966), the Court cited Boyd when holding that “[i]t is 

clear that the protection of the [Fifth Amendment] privilege reaches an 

accused’s communications, whatever form they might take, and the compulsion of 

responses which are also communications, for example, compliance with a 

subpoena to produce one’s papers.” (emphasis added).

[22] The Fisher Court proceeded to examine the question of what kinds of acts of 

production are “testimonial.” Fisher involved two consolidated cases in which 

the IRS served summonses on two attorneys, directing the attorneys to produce 

documents obtained by their clients relating to tax returns. Both attorneys 

argued inter alia that this would violate their clients’ rights against self-

 

14 See also Carpenter v. United States, 138 S. Ct. 2206, 2271 (2018) (Gorsuch, J., dissenting) (citing Richard A. 

Nagareda, Compulsion “To Be a Witness” and the Resurrection of Boyd, 74 N.Y.U.L. Rev. 1575, 1605–23 (1999); 

Rex v. Purnell, 96 Eng. Rep. 20 (K.B. 1748); Christopher Slobogin, Privacy at Risk 145 (2007)). 
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incrimination. The Court held that the Fifth Amendment privilege could apply 

to situations where a defendant is compelled to produce incriminating evidence, 

and that the act of producing even unprivileged evidence can have 

communicative aspects itself and may be testimonial, entitling it to Fifth 

Amendment protection. Id. at 409–10. Nevertheless, the Court noted that the 

Government was “in no way relying on the ‘truth-telling’ of the taxpayer to 

prove the existence of or his access to the documents,” and the production of 

the documents did not authenticate the documents, because they had been 

produced by accountants and not the taxpayers being investigated themselves. 

Id. at 411. 

[23] The Court further held that, because the existence, location, and authenticity of 

the evidence sought was known to the government, the Fifth Amendment 

privilege was inapplicable because the contents of the individual’s mind was not 

used against him. See id. (“The existence and location of the papers are a 

foregone conclusion and the taxpayer adds little or nothing to the sum total of 

the Government’s information by conceding that he in fact has the papers.”).15

Thus, the Fifth Amendment privilege did not apply to the third-party 

production of documents requested in Fisher. Id. at 414.

 

15 This is known as the “foregone conclusion” doctrine. Andrew T. Winkler, Password Protection and SelfIncrimination: Applying the Fifth Amendment Privilege in the Technological Era, 39 Rutgers Computer & Tech. L.J. 

194, 197 (2013). Many cases involving encryption have been decided under the foregone conclusion doctrine, 

a doctrine outstripped by technology, as discussed in more detail below. 
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[24] The Court in Doe II considered the legality of an order compelling the target of 

a grand jury investigation to authorize foreign banks to disclose records of his 

accounts. 487 U.S. at 202. The target of the investigation argued that 

compelling him to sign the consent form would give the government access to 

potentially incriminating records that would otherwise be unavailable to it, due 

to the fact that the District Court had no power to order foreign banks to 

produce the documents. Id. at 204. The Court rejected this argument and held 

that “an accused’s communication must itself, explicitly or implicitly, relate a 

factual assertion or disclose information.” Id. at 210. 

[25] Justice John Paul Stevens dissented, and in its acknowledgement of his dissent, 

the majority famously noted: 

We do not disagree with the dissent that “[t]he expression of the 

contents of an individual’s mind” is testimonial communication 

for purposes of the Fifth Amendment. We simply disagree with 

the dissent’s conclusion that the execution of the consent 

directive at issue here forced petitioner to express the contents of 

his mind. In our view, such compulsion is more like “be[ing] forced to 

surrender a key to a strongbox containing incriminating documents”

than it is like “be[ing] compelled to reveal the combination to 

[petitioner’s] wall safe.”

Id. at 210 n.9 (quoting id. at 219 n.1 (Stevens. J., dissenting) (emphasis added). 

[26] Twelve years later, but before the advent of smartphones and a robust internet, 

the Supreme Court again revisited this issue in United States v. Hubbell, 530 U.S. 

27 (2000), a case that arose out of the Whitewater investigation. The target in 

that case, Webster Hubbell, had pleaded guilty to charges of mail fraud and tax 
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evasion arising out of his billing practices. Id. at 30. In the plea agreement, 

Hubbell promised to provide the Independent Counsel with “full, complete, 

accurate, and truthful information” about matters relating to the Whitewater 

investigation. Id. 

[27] Later, while Hubbell was serving his twenty-one-month prison sentence, a 

grand jury issued a subpoena duces tecum demanding the production of eleven 

categories of documents. Id. at 31. Hubbell invoked his Fifth Amendment 

privilege. Id. The Independent Counsel then produced an order from the 

District Court directing Hubbell to comply with the subpoena and granting him 

immunity against the government’s use and derivative use of the compelled 

testimony. Id. Hubbell then delivered the specified documents and yet was 

subsequently indicted again for various wire fraud, mail fraud, and tax crimes. 

Id. The District Court dismissed this new indictment based on the violation of 

the immunity previously granted. Id. at 32. The United States Court of Appeals 

for the District of Columbia Circuit reversed and remanded, and the Supreme 

Court granted certiorari. 

[28] The Supreme Court, citing Fisher, reiterated that “a person may be required to 

produce specific documents even though they contain incriminating assertions 

of fact or belief because the creation of those documents was not ‘compelled’

within the meaning of the privilege.” Id. at 35–36. Accordingly, the simple fact 

that the documents contained incriminating evidence did not mean that 

Hubbell could avoid complying with the subpoena. Id. at 36. 
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[29] Importantly, however, the Court made it clear that the very act of producing 

documents in response to a subpoena may have a compelled testimonial aspect 

in and of itself. Id. “The ‘compelled testimony’ that is relevant . . . is not to be 

found in the contents of the documents produced in response to the subpoena. It 

is, rather, the testimony inherent in the act of producing those documents.” Id. at 40 

(emphasis added). 

[30] In discussing the government’s subpoena, which had required the defendant to 

provide numerous responses to very broad requests, the Court stated that “[t]he 

assembly of those documents was like telling an inquisitor the combination to a 

wall safe, not like being forced to surrender the key to a strongbox.” Id. at 43.

The Court then held that the “foregone conclusion” rationale did not apply to 

overcome the testimonial aspects of Hubbell’s production of documents because 

the government could not identify the files, describe what they were, tell 

whether they existed, or whether Hubbell had knowledge of, possession of, or 

access to them. See id. at 45 (“here the Government has not shown that it had 

any prior knowledge of either the existence or the whereabouts of the 13,120 

pages of documents ultimately produced by respondent.”). Only Hubbell’s 

responses had provided the government with this information. See id. at 43 (“It 

was unquestionably necessary for respondent to make extensive use of ‘the 

contents of his own mind’ in identifying the hundreds of documents responsive 

to the requests in the subpoena.”). The Court concluded that the Fifth 

Amendment privilege did apply and that the grant of immunity extended to the 
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use and derivative use of the testimonial aspects of the production of those 

documents. Id. 

[31] We acknowledge that the United States Supreme Court has backtracked from 

its earlier pronouncements that the protections afforded by the Fifth 

Amendment, in addition to the Fourth Amendment, implicated privacy 

concerns. Indeed, the Fisher Court noted that although it had “often stated that 

one of the several purposes served by the constitutional privilege against 

compelled testimonial self-incrimination is that of protecting personal privacy,” 

it then held that “[w]e cannot cut the Fifth Amendment completely loose from 

the moorings of its language, and make it serve as a general protector of 

privacy—a word not mentioned in its text and a concept directly addressed in 

the Fourth Amendment. We adhere to the view that the Fifth Amendment 

protects against compelled self-incrimination, not [the disclosure] of private 

information.” 425 U.S. at 399–401; see also United States v. Doe, 465 U.S. 605,

618 (1984) (“Doe I”) (O’Connor, J., concurring) (“The notion that the Fifth 

Amendment protects the privacy of papers originated in Boyd [], but our 

decision in Fisher [], sounded the death-knell for Boyd.”). 

[32] Still, courts continue to acknowledge that the Fifth Amendment’s anti-selfincrimination provision “protect[s] privacy in the sense of confidentiality.” See 

Willan v. Columbia Cty., 280 F.3d 1160, 1163 (7th Cir. 2002). Thus, while we do 

not consider the Fifth Amendment as a “general protector of privacy,” we 

cannot ignore the privacy/confidentiality implications that compelled 

revelation of a smartphone passcode would inevitably have based on the 
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extraordinary quantitative and qualitative differences between the amount of 

digital information stored on a smartphone compared to traditional paperbased media. See Section VI, infra. We believe that legal analysis of digital 

information storage must change, and soon, in order to be relevant and 

credible. See Section VI and Section VIII, infra.

V. The Testimonial Nature of a Passcode

[33] Under current, paper-based legal analysis, Seo argues that her passcode is 

testimonial in nature, and that compelling her to reveal it, or compelling her to 

unlock the phone using the passcode, would be a testimonial act that she cannot 

be compelled to do without violating her Fifth Amendment privilege. 

Contrasting the facts of the present case with those in Doe II, Seo notes that she 

is being compelled to do more than merely sign a consent form to obtain 

records from a third party; she is instead being compelled to reveal the contents 

of her own mind—her password. She also argues that compelling her to reveal 

her password is more invasive than just requiring her to assemble documents, 

which was found to be testimonial in Hubbell. She is instead being compelled to 

give the State access to the entire contents of her mobile phone, which in all 

probability contains a wealth of digital information completely unrelated to the 

focus of law enforcement needs in her case. 

[34] The State contends that the Fifth Amendment is not implicated by the trial 

court’s order because it does not compel Seo to reveal the password to the State; 

it simply requires her to unlock the phone using her password (or other method) 

and disable the password feature so that the State may continue to access it. 
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Accordingly, the State argues, Seo need not reveal the password, and therefore 

the “contents of her mind,” to the State at all. Therefore, according to the 

State’s argument, the foregone conclusion doctrine from Fisher controls.

[35] Many courts that have considered this issue have held that forcing a person to 

reveal their password is testimonial because, in the words of the Doe II Court, it 

is “[t]he expression of the contents of an individual’s mind.” 487 U.S. at 210 

n.9; see also United States v. Kirschner, 823 F.Supp.2d 665, 669 (E.D. Mich. 2010) 

(holding that the government could not compel the defendant to reveal his 

password because this amounted to “testimony” from him which would 

“requir[e] him to divulge through his mental processes his password.”); Kiok, 

supra at 76 (“Because a password comes from a defendant’s mind, its revelation 

is testimonial.”). 

[36] Indeed, when addressing Justice Stevens’s dissent in Doe, the majority of the 

Court noted that compelling the defendant in that case to sign the bank 

disclosure forms was more akin to “be[ing] forced to surrender a key to a 

strongbox containing incriminating documents” than it was to “be[ing] 

compelled to reveal the combination to [petitioner’s] wall safe.” 487 N.E.2d at 

210 n.9. Here, under precedent as it now exists, we hold that the State is 

seeking the electronic equivalent to a combination to a wall safe—the passcode 

to unlock the iPhone. 

[37] Moreover, some courts appear to have rejected the State’s attempt to 

distinguish between compelling a defendant to reveal the passcode versus 
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merely compelling the defendant to unlock the phone herself and give the State 

access to the unlocked phone. As summarized by one commentator: 

But what about forcing you to enter a password? Is this a 

compellable physical act? Three courts have answered no. In 

their view, forcing a person to use a password to decrypt a hard 

drive is not a physical act because it forces the person to use the 

contents of his mind. Also prevalent in these courts’ reasoning is 

the key-combination dicta already discussed: “A password, like a 

combination, is in the suspect’s mind, and is therefore testimonial 

. . . .”

Dan Terzian, The Micro-Hornbook on The Fifth Amendment and Encryption, 104

Geo. L. J. Online 168, 171–72 (2016).

[38] The three cases Terzian refers to are: In re Grand Jury Subpoena Duces Tecum 

Dated March 25, 2011, 670 F.3d 1335, 1346 (11th Cir. 2012), which held that 

“the decryption and production of the hard drives would require the use of the 

contents of Doe’s mind and could not be fairly characterized as a physical act 

that would be nontestimonial in nature.”; In re Boucher, 2007 WL 4246473, at 

*3 (D. Vt. Nov. 29, 2007),16 which held that entering a password into a 

computer implicitly communicates facts and was therefore testimonial in 

nature; and Commonwealth v. Baust, 89 Va. Cir. 267 (2014), which held that 

compelling defendant to provide access to his locked phone through his 

 

16 The initial decision in Boucher was issued by the District Court Magistrate, whose decision was overturned 

by the District Court Judge in the subsequent decision. But the subsequent decision was based on the 

“foregone conclusion” doctrine. See In re Boucher, 2009 WL 424718 at *3 (D. Vt. Feb. 19, 2009) (citing Fisher, 

425 U.S. at 411). 
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 24 of 68

passcode was testimonial. See also Kiok, supra at 76 (“an order to compel 

decryption [i.e., unlocking a smartphone] compels a testimonial act.”); Andrew 

T. Winkler, Password Protection and Self-Incrimination: Applying the Fifth 

Amendment Privilege in The Technological Era, 39 Rutgers Computer & Tech. L.J. 

194, 209 (2013) (“Entering a password or otherwise decrypting the contents on

a computer is a testimonial act that receives the full protection of the Fifth 

Amendment.”).17

[39] Upon consideration of this authority, and because we believe that electronic 

data and the devices that contain it are fundamentally different than paper 

documents and paper storage, we reject the State’s attempt to distinguish 

between compelling Seo to convey her passcode to the State and compelling 

Seo to simply unlock her phone by entering the passcode itself. It is a distinction 

 

17 Interestingly, some courts have made a distinction between compelling a person to unlock a phone using a 

password and compelling a person to unlock a phone using a fingerprint. As noted above, the Supreme Court 

has held that forcing someone to submit to the taking of fingerprints is not testimonial. Schmerber, 384 U.S. at 

764; see also Hook, 471 F.3d at 773–74. Because of this, at least two courts have held that there is no Fifth 

Amendment problem with compelling a defendant to produce a fingerprint to unlock a smartphone. Baust, 89 

Va. Cir. 267, at *4; State v. Diamond, 905 N.W.2d 870, 878 (Minn. 2018). As noted, supra, it is the height of 

irony that the most secure current forms of electronic identification, the fingerprint, and more recently, facial 

recognition or retinal scans, currently have no protection against compulsory use by law enforcement 

authorities under Schmerber et al. This difference is reflective of legal thinking from a paper-based world that 

courts currently are called upon to stretch to fit a world of electronic data about everything and everyone. 

Our courts need a new paradigm that reflects our modern world.

However, even the fingerprint-unlocking function of the iPhone 7 at issue here will become inoperative after 

forty-eight hours, thereby requiring the use of a passcode. See Terzian, 104 Geo. L. J. Online at 169 (citing 

Apple, About Touch ID Advanced Security Technology (Sept. 11, 2017) (noting that a fingerprint alone is 

insufficient to unlock an iPhone when “more than 48 hours have elapsed from the last time” the phone was 

unlocked). Here, it has been well more than forty-eight hours since Seo’s phone has been unlocked by the 

fingerprint sensor. Thus, even though the State might be able to compel Seo to attempt to use her fingerprint 

to unlock the phone, this would, in all likelihood, be unsuccessful. 
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without a difference because the end result is the same: the State is compelling 

Seo to divulge the contents of her mind to obtain incriminating evidence.

[40] Furthermore, we consider Seo’s act of unlocking, and therefore decrypting the 

contents of her phone, to be testimonial not simply because the passcode is akin 

to the combination to a wall safe as discussed in Doe. We also consider it 

testimonial because her act of unlocking, and thereby decrypting, her phone 

effectively recreates the files sought by the State. As discussed above, when the 

contents of a phone, or any other storage device, are encrypted, the cyphertext 

is unintelligible, indistinguishable from random noise. In a very real sense, the 

files do not exist on the phone in any meaningful way until the passcode is 

entered and the files sought are decrypted. Thus, compelling Seo to unlock her 

phone goes far beyond the mere production of paper documents at issue in 

Fisher, Doe, or Hubbell. Because compelling Seo to unlock her phone compels 

her to literally recreate the information the State is seeking, we consider this recreation of digital information to be more testimonial in nature than the mere 

production of paper documents.

[41] Stripping legal precedent away from the issue, the very nature of a passcode 

supports the conclusion that it is the product of one’s mind. Many people 

choose a passcode that is uniquely memorable to them in some way. Often, the 

password is an important date or other bit of information they hope will not be 

easily guessed, but that is still uniquely memorable to them. To force Seo to 

reveal her passcode is the very definition of compelling her to reveal the 
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 26 of 68

contents of her mind. Accordingly, we hold that compelling Seo to unlock her 

phone in any manner is testimonial.18

VI. The “Foregone Conclusion” Doctrine

[42] The State and the dissent argue that compelling Seo to unlock her phone is not 

a violation of the Fifth Amendment privilege because of the “foregone 

conclusion” doctrine. “Even if a response is testimonial, the privilege does not 

apply where the testimonial portion is a foregone conclusion.” Dan Terzian, 

Forced Decryption as a Foregone Conclusion, 6 Cal. L. Rev. Cir. 27, 28 (May 2015). 

Under the “foregone conclusion” doctrine: 

the Fifth Amendment does not protect an act of production when 

any potentially testimonial component of the act of production—

such as the existence, custody, and authenticity of evidence—is a 

“foregone conclusion” that “adds little or nothing to the sum 

total of the Government’s information.” [Fisher, 425 U.S. at 411]. 

For the rule to apply, the Government must be able to “describe 

with reasonable particularity” the documents or evidence it seeks 

to compel. [Hubbell, 530 U.S. at 30]. 

United States v. Apple MacPro Computer, 851 F.3d 238, 247 (3d Cir. 2017); see also

Kerr & Schneier, supra at 1002 (“The foregone conclusion doctrine teaches that,

 

18 For the Fifth Amendment privilege to apply, the testimony at issue must also be incriminating. Bleeke, 6 

N.E.3d at 925 (citing Hiibel, 542 U.S. at 190). Here, neither party disputes that the information the State seeks 

from Seo’s iPhone would be incriminating. Moreover, given the vast amounts of personal information 

located on a typical smartphone, there should be a reasonable presumption that something incriminating 

would be discovered during review of the contents of almost anyone’s smartphone. Consider the expansive 

law enforcement claims that could be made under the plain view doctrine or the good faith exception to the 

Fourth Amendment or Article 1 Section 11 of the Constitution of Indiana protections when searching a 

smartphone. See note 26, infra. 
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if the testimonial aspect of production is already known to the government and 

is not to be proven by the testimonial act, then the testimony is a foregone 

conclusion and the Fifth Amendment privilege does not apply.”).19

[43] “Although the State need not have ‘perfect knowledge’ of the requested 

evidence,” for the foregone conclusion rationale to apply, “it ‘must know, and 

not merely infer,’ that the evidence exists, is under the control of defendant, and 

is authentic.” State v. Stahl, 206 So.3d 124, 135–36 (Fla. Dist. Ct. App. 2016)

(citing United States v. Greenfield, 831 F.3d 106, 116 (2d Cir. 2016)) (emphasis 

removed). Thus, where the foregone conclusion rationale applies, the question 

is not of testimony, but of surrender. Id. at 136 (citing Fisher, 425 U.S. at 411).

[44] In this sense, the foregone conclusion doctrine of Fifth Amendment 

jurisprudence contains its own requirement of specificity regarding the 

information sought from the defendant, i.e., that the State or government be 

able to describe with reasonable particularity the documents or evidence it seeks 

to compel. Very importantly, this particularity requirement prevents the 

foregone conclusion exception from swallowing the rule by requiring that the 

State already know the documents or evidence it seeks. So long as the State 

already knows with reasonable particularity the documents or evidence it seeks, 

the surrender of the evidence “adds little or nothing to the sum total of the 

 

19 There appears to be some confusion as to whether the foregone conclusion rationale is a true exception to 

the Fifth Amendment privilege as it applies to testimonial production of documents, or whether the foregone 

conclusion rationale means that the production of the documents at issue is simply not testimonial. Either 

way, however, if the foregone conclusion doctrine is applicable, under current precedent, there is no Fifth 

Amendment protection. 
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 28 of 68

Government’s information.” Fisher, 425 U.S. at 411. In contrast, where the 

State does not already know the evidence exists, it cannot describe with 

reasonable particularity the evidence it seeks, and the foregone conclusion 

exception will not apply. 

[45] The State argues that the foregone conclusion should apply under the facts of 

the present case. The State focuses its argument not on the contents of the phone, 

but on the passcode itself. Specifically, the State claims, “the act of unlocking a 

cell phone contains only one implied fact: the person knows the password to the 

phone, which by inference says that the person has control over and possession 

of the phone.” Appellee’s Br. at 19. The State therefore contends that the 

foregone conclusion rationale should apply because “a person must know her 

passcode to use her own phone, the testimony implicit in the act of unlocking the 

phone is a foregone conclusion when the State has proven that the phone 

belongs to her.” Id. at 22 (emphasis added). 

[46] There is some support for the State’s position. Indeed, it is one of the two paths 

of legal analysis using a paper-based analogy. For example, in State v. Stahl, the 

court held that, in deciding whether providing a passcode to a locked phone fell 

within the ambit of the foregone conclusion doctrine, “the relevant question is 

whether the State has established that it knows with reasonable particularity 

that the passcode exists, is within the accused’s possession or control, and is 

authentic.” 206 So.3d at 136 (emphasis added); see United States v. Spencer, ___ 

F.Supp.3d ___, 2018 WL 1964588 at *3 (N.D. Cal. April 26, 2018) (holding

that, to determine whether the foregone conclusion doctrine applied, the 
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appropriate question was whether the government could show that it was a 

foregone conclusion that the defendant could decrypt the devices); 

Commonwealth v. Davis, 176 A.3d 869, 876 (Pa. Super. Ct. 2017) (holding that 

the foregone conclusion doctrine applied where the state was able to show that 

it knew that the passcode existed, it was within the defendant’s possession or 

control, and was authentic); Commonwealth v. Gelfgatt, 11 N.E.3d 605, 615 

(Mass. 2014) (concluding that the “factual statements that would be conveyed 

by the defendant’s act of entering an encryption key in[to] the computers [were] 

‘foregone conclusions[.]’”); United States v. Fricosu, 841 F. Supp. 2d 1232, 1236–

37 (D. Colo. 2012) (holding that the foregone conclusion doctrine applied 

where the State had evidence proving the encrypted computer belonged to the 

defendant and that she knew the password). 

[47] However, Seo argues the other path of the paper-based legal analogy: the 

foregone conclusion doctrine does not apply here because the State cannot 

describe with reasonable particularity the digital files or evidence it seeks to 

compel her to produce. That is, Seo argues that the focus of the foregone 

conclusion analysis is not whether it is a foregone conclusion that Seo knows 

her own passcode; rather, the focus should be on whether the State can describe 

with reasonable particularity the digital information it seeks to compel her to 

produce. See Apple MacPro Computer, 851 F.3d at 247 (citing Hubbell, 530 U.S. at 

30). And there is support for Seo’s framing and application of the foregone 

conclusion doctrine in other jurisdictions that have considered her argument.
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[48] In Commonwealth v. Baust, the court held that the password itself was not a 

foregone conclusion because it was not known outside of the defendant’s mind. 

89 Va. Cir. 267 at *4. Presaging Seo’s argument here, the Baust court held that, 

“[u]nlike a document or tangible thing, such as an unencrypted copy of the 

footage itself, if the password was a foregone conclusion, the Commonwealth 

would not need to compel Defendant to produce it because they would already 

know it.” Id.; see also In re Grand Jury Subpoena Duces Tecum Dated March 25, 

2011, 670 F.3d at 1347 (holding that the foregone conclusion doctrine was 

inapplicable where the government had not shown that it possessed knowledge 

as to the “files on the [encrypted] hard drives at the time it attempted to compel 

production.”); Sec. & Exch. Comm’n v. Huang, 2015 WL 5611644, at *4 (E.D. Pa. 

Sept. 23, 2015) (holding that the foregone conclusion doctrine did not apply 

because the SEC had no evidence any digital files it sought were actually 

located on the target’s work-issued smartphones). 

[49] With an eye toward a more comprehensive rethinking of the legal analysis 

regarding digital information and storage, we believe these cases express the 

better rationale.

20 What is being compelled here is not merely the passcode. As 

described above, compelling Seo to enter her password forces her to effectively 

re-create the entire contents of her phone. In the words of the Third Circuit 

 

20 This is one of the two available rationales under the outdated paper paradigm that our courts are stumbling 

through in an effort to resolve information production disputes regarding electronic data on electronic 

devices. Judge May in her dissent chooses the opposite alternative. We believe the alternative branch of cases 

we have chosen contains the better rationale because it not only resolves the instant issue and case; it also 

presages a suggested way forward in this important and continually evolving area.
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Court of Appeals, the State must be able to describe with reasonable 

particularity the digital files it seeks to compel. Apple MacPro Computer, 851 F.3d 

at 247 (citing Hubbell, 530 U.S. at 30). Here, what the State seeks to compel is 

not merely the password, but the entire contents of Seo’s iPhone. Thus, for the 

foregone conclusion doctrine to apply, the State must be able to describe with 

reasonable particularity the discrete contents on Seo’s phone—e.g., all texts to 

D.S. created on Seo’s iPhone—that it is compelling her to not only produce, but 

to re-create by entering her passcode and decrypting the contents of the phone. 

This is a burden the State has not met. 

[50] To be sure, the investigating detective has already viewed Seo’s phone and has

seen information that caused him to believe that D.S. was the victim of stalking 

and harassment by Seo. Indeed, Detective Inglis testified that he made a 

“forensic download” of the contents of Seo’s phone. Tr. p. 6. We may therefore 

presume that the State already has much of the information contained on Seo’s 

phone.21 But it is not this information the State now seeks to compel. Instead, 

what the State seeks now is evidence that might have been created on Seo’s 

 

21 We also note that the information the State seeks is not of an emergency nature, or of a completely new 

description or character from that information it already has. The State could potentially prove its case 

entirely from the text messages received by D.S. and that may still be found on his cellphone, comparing the 

alleged threats and harassment language after the protective order was issued to the threatening and harassing 

texts contained in its forensic download of Seo’s cellphone with her consent. The State has also not shown 

that it has tried unsuccessfully to obtain the desired information through readily available and far less 

constitutionally intrusive methods, such as third-party subpoenas to Seo’s cell carrier regarding the texts at 

issue or to Apple to inquire as to what applications she has downloaded, with an eye toward those apps or 

services that could mask her cellphone number. A subpoena to Google could also reveal any Google Voice 

numbers Seo has secured, and the State could compare those numbers to the sources of the texts to D.S. 
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 32 of 68

phone after this forensic download, i.e., evidence that Seo sent the flood of 

threatening and harassing messages to D.S. But again, the State has not 

described with any particularity the digital information it seeks to access. 

[51] We acknowledge that the State secured a search warrant for the contents of 

Seo's iPhone. However, this warrant did not describe with any reasonable 

particularity the digital information the State sought to find, as the Fifth 

Amendment requires.

22 Instead, the warrant merely stated that the police were:

authorized and ordered in the name of the State of Indiana, with 

necessary and proper assistance, in the daytime or nighttime, to 

search the property located at and described as: 

5. for purpose of searching items described in the sworn 

evidence, to wit: 

That Katelin Eunjoo Seo be compelled to unlock (via 

biometric fingerprint, passcode, password, or otherwise) the I 

Phone [sic] 7 plus with serial number ************ and 

cellular phone number ******* pursuant to Indiana Code 35-

33-5-11(a) and that if she fails to comply with this order, that 

she shall be subject to the contempt powers of the court. 

 

22 We decline to address whether the issuance of a search warrant is sufficient to meet the State’s burden 

under the foregone conclusion doctrine to describe with reasonable particularity the digital files or evidence it 

seeks to compel. The Fourth Amendment requirement for probable cause requires only that the magistrate 

issuing the warrant make a “practical, common-sense decision whether, given all the circumstances set forth 

in the affidavit, there is a fair probability that contraband or evidence of a crime will be found in a particular 

place.” State v. Spillers, 847 N.E.2d 949, 952–53 (Ind. 2006). This appears to us to be a lower standard than 

that required for the foregone conclusion doctrine to apply, i.e., that the government be able to describe with 

“reasonable particularity” the documents or evidence it seeks to compel. Hubbell, 530 U.S. at 44–45. 

Moreover, here, there has yet to be a challenge to the propriety of the warrant. Indeed, such a challenge 

would likely come only after the State has searched the phone, discovered incriminating evidence, if any, and 

attempts to use that evidence at trial. 
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 33 of 68

Appellant’s App. p. 49. 

[52] Thus, the warrant itself does not describe with any particularity the digital 

information the State seeks to compel Seo to produce or the evidence the State 

is authorized to search for.23 Nor does the trial court’s order on contempt 

describe with any reasonable particularity the digital information the State seeks 

to compel.

24

[53] Going forward the State can, and should, describe the information it seeks and 

the programs that contain it on Seo’s cellphone, e.g., any texts between Seo and 

D.S., whether in Apple’s Message application, Facebook, Twitter or otherwise,

and the contents of any application that allows a user to change the apparent 

telephone number originating an electronic communication, such as Google 

Voice or Pinger. And perhaps more importantly, in its order the court should 

also require the State to limit its search within messaging to variations of D.S’s 

 

23 This observation is not a comment on the propriety of the search warrant for purposes of the Fourth 

Amendment or Article 1, Section 11 of the Indiana Constitution. We merely hold that for purposes of 

applying the foregone conclusion doctrine under the Fifth Amendment, the State has not described with 

reasonable particularity the digital files or data it seeks to compel. 

24 The dissent contends that, based on Detective Inglis’s testimony at the hearing on the State’s motion to 

hold Seo in contempt, “it seems self-evident the State is seeking evidence on Seo’s phone of an App or 

multiple Apps that would allow her to mask her identity and evidence that Seo’s phone had generated the 

phone calls and texts that D.S. received from phone numbers that did not belong to any other person.” Slip 

op. at 65 n.8. But by the time Detective Inglis testified, the State had already obtained a warrant compelling 

Seo to unlock her phone. And there is nothing in the language of the warrant itself that describes with any 

particularity the information the State was authorized to look for. Although the dissent faults Seo for failing 

to present us with a more complete record, it is the language of the warrant itself, not the probable cause 

affidavit or testimony supporting the warrant, that is the controlling legal document which compels Seo to 

unlock her phone. And even after Detective Inglis’s testimony, the order holding Seo in contempt again does 

not describe with any particularity the information the State seeks to compel.
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name, rather than allowing the State to view everything that is contained in the 

messaging applications involved. These are not onerous requirements.

[54] Accordingly, we conclude that the State has not met the requirements of the 

foregone conclusion doctrine because it has not demonstrated that it can, with 

reasonable particularity, identify any files or describe where they are. See

Hubbell, 530 U.S. at 45; In re Grand Jury Subpoena Duces Tecum Dated March 25, 

2011, 670 F.3d at 1347; Sec. & Exch. Comm’n, 2015 WL 5611644 at *4. Instead, 

here, all the State has demonstrated is that evidence relating to the harassment 

and intimidation charges is probably on the phone. But it has failed to describe 

with adequate reasonable particularity the files or evidence it seeks on Seo’s 

smartphone.

[55] It bears repeating that writs of assistance were the immediate evils that 

motivated the framing and adoption of the Fourth Amendment. Payton v. New 

York, 445 U.S. 573, 583 (1980). Although this case does not directly involve the 

Fourth Amendment, in criminal cases raising the Fifth Amendment, the law 

requires the State to describe the information it seeks to compel production of 

with reasonable particularity. 

[56] Even in civil cases, modern, electronic discovery standards require that the 

requesting party specifically tailor its request to discover relevant information.
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 35 of 68

See Zubulake v. UBS Warburg LLC, 217 F.R.D. 309, 322 (S.D.N.Y. 2003).

25 And 

in civil cases, opponents are also required to detail and attempt to obtain the 

information sought from third-party sources before seeking to compel the 

opponent to produce the information directly. The same should be true in 

criminal cases as well. Only then is an assault on Fifth Amendment privilege 

against self-incrimination a reasonable option under the law.

[57] As noted above, the Fifth Amendment privilege against self-incrimination 

reflects our nation’s fundamental principles. These principles should not be 

altered by the advance of technology. To the contrary, they must be applied 

consistently and with recognition of the technology that has replaced physical 

papers, files, boxes and safes. Cf. Carpenter v. United States, 138 S. Ct. 2206, 2222

(2018) (“When confronting new concerns wrought by digital technology, this 

Court has been careful not to uncritically extend existing precedents.”); Collins 

v. Virginia, 138 S. Ct. 1663, 1671 (2018) (declining to expand the automobile 

exception to the warrant requirement to include a search of a vehicle parked in 

the curtilage of a home because to do so would “undervalue the core Fourth 

Amendment protection afforded to the home and its curtilage and ‘untether’ the 

automobile exception ‘from the justifications underlying’ it.”) (quoting Riley v. 

California, 573 U.S. ___, 134 S. Ct. 2473, 2485 (2014)). Indeed, these principles 

 

25 In civil cases involving requests for discovery of electronic information, courts have applied a multi-factor 

test that includes consideration of the extent to which the request is specifically tailored to discover relevant 

information and the availability of such information from other sources. Zubulake, 217 F.R.D. at 322. 

Certainly, such concerns are all the more pressing in criminal cases where the State seeks production of

digital information that may incriminate the defendant or others. 
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 36 of 68

are all the more important given the amount and potentially incriminating 

nature of information contained in a smartphone.

VII. Outdated Analogies

[58] Advances in technology have rendered paper-based analogies more and more 

inapt, if not wholly inadequate. See Kiok, supra at 76 (“Many analogies to older 

technology simply do not replicate how electronic encryption actually works. 

Although metaphors are useful in analogizing new technology to older, more 

familiar one[s], if the metaphor is stretched too far, it loses its usefulness to 

courts and commentators.”). Thus, to compare a smartphone and its contents 

to a paper file located in a locked file cabinet or wall safe, as the current case 

law does, is at the very least, a gross oversimplification. The information stored 

on a smartphone is qualitatively and quantitatively unique. 

[59] As indicated in our introduction, the sheer quantity of personal information 

contained on a typical smartphone is truly astounding. In the years that the 

paper-based analogies were first made, it would have taken thousands, if not 

millions, of sheets of paper and photographs to equal the amount of digital 

information, such as email, text messages, photographs, and videos, stored in a 

modern smartphone. 

[60] As recently as 2000, “only” 80 billion consumer photos were taken annually. 

Since the advent of the smartphone, this number has grown at an astonishing 

rate: by 2010, the number of photos taken annually had nearly tripled to over 

200 billion, with projections that 1.3 trillion photos would be taken by 2017, and 
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 37 of 68

over 79% of these photos were taken with some kind of phone. See Stephen 

Heyman, Photos, Photos Everywhere, N.Y. Times, July 29, 2015.26 These 

predictions were pretty accurate, as it was reported that 1.2 trillion photos were 

taken in 2017, 85% taken with smartphones. See Caroline Cakebread, People will 

take 1.2 trillion digital photos this year — thanks to smartphones, Business Insider, 

Aug. 31, 2017.27 A 2015 study revealed that the average smartphone user takes 

150 photos per month and has 630 photos stored on the phone. See Janko 

Roettgers, Special report: How we really use our camera phones, GigaOm (Jan. 23, 

2015, 5:00 a.m. CDT).28 These numbers can only have grown since then with 

the increased storage capacity of more recent smartphones. 

[61] Text messaging presents a similar story. A 2011 study by the Pew Research 

Center showed that users sent or received an average of 41.5 messages per day. 

See Aaron Smith, How Americans Use Text Messaging, Pew Research Center 

(Sept. 19, 2011).29 This number has certainly only grown. Indeed, one report 

indicated that between 2011 and 2014, global text message usage grew by 

140%. Kenneth Burke, How Many Texts Do People Send Every Day?, Text Request 

(May 18, 2016).30 This same report indicates that globally 18.7 billion text 

 

26 Available at https://www.nytimes.com/2015/07/23/arts/international/photos-photos-everywhere.html

27 http://www.businessinsider.com/12-trillion-photos-to-be-taken-in-2017-thanks-to-smartphones-chart2017-8

28 https://gigaom.com/2015/01/23/personal-photos-videos-user-generated-content-statistics/

29 Available at http://www.pewinternet.org/2011/09/19/how-americans-use-text-messaging/

30 https://www.textrequest.com/blog/how-many-texts-people-send-per-day/
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 38 of 68

messages were sent every day. Id. And these statistics do not include two of the 

most widely used app-to-app messaging platforms, WhatsApp and Facebook 

Messenger, which then combined for 60 billion messages per day. Id. Apple’s 

Messages app sent over 40 billion notifications per day in 2016 and peaked at 

200,000 messages per second. See Kif Leswing, Apple says people send as many as 

200,000 iMessages per second, Business Insider, Feb. 13, 2016 (citing an interview 

of Apple Services Vice President Eddy Cue).31

[62] The point of these statistics is not to overwhelm the reader with numbers, but 

simply to illustrate how different a smartphone is from traditional paper-based 

media. To compare a smartphone to a locked strongbox or a wall safe, as the 

currently existing case law does, stretches these analogies beyond the breaking 

point. Perhaps a more apt analogy would be to compare a smartphone to a 

literal warehouse containing thousands of personal photographs, millions of 

lines of text contained in emails, messages, personal conversations, medical 

information, and other items of the most intimate nature. Some commentators 

have even compared a smartphone to a “second brain” or “an extension of the 

mind.” See Yo Zushi, Life with a smartphone is like having a second brain in your 

 

31 http://www.businessinsider.com/eddy-cue-200k-imessages-per-second-2016-2 (citing The Talk Show, 

Daring Fireball (Feb. 12, 2016), https://daringfireball.net/thetalkshow/2016/02/12/ep-146
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 39 of 68

pocket, New Statesman (Feb. 22, 2017);32 Karina Vold, Is Your Smartphone an 

Extension of Your Mind?, Motherboard (Mar. 2, 2018, 10:00 a.m.).33 

[63] The paper-based analogies are also less and less apt as technology advances. In 

the days of the floppy disk, it was understandable to compare a digital file 

stored on such a disk to a physical piece of paper stored in a filing cabinet. 

Indeed, the basis of the most computer user interfaces retains the “desktop 

metaphor” of files, folders, and trash cans and recycling bins. But the advent of 

readily available, reliable, fast, and easy-to-use encryption has changed this 

metaphor. As noted above, encryption takes existing information and obscures 

it in such a manner that it is unreadable and unrecoverable unless it is decrypted 

with the proper key. To use the wall-safe metaphor, with encryption, when one 

locks the safe with the combination, the letter inside is shredded into millions of 

tiny pieces that no person could ever hope to reassemble; yet when one reenters 

the combination and unlocks the safe, the pieces of the letter almost magically 

reassemble themselves to reconstitute the letter. 

[64] Despite the weaknesses of the current paper-based metaphors, the controlling 

Fifth Amendment case law still uses these metaphors. And we are not at liberty 

to create our own analogies or frameworks when it comes to the federal 

Constitution. This is a task reserved for the High Court itself. Thus, as we have 

explained, we believe that compelling an individual to unlock her smartphone 

 

32 https://www.newstatesman.com/science-tech/2017/02/life-smartphone-having-second-brain-your-pocket

33 https://motherboard.vice.com/en_us/article/qvemgb/is-your-smartphone-an-extension-of-your-mind
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 40 of 68

by passcode is a testimonial act more akin to unlocking a wall safe than

handing over the key to a locked strongbox. 

VIII: A Way Forward?

[65] Electronic data storage of any type has stretched paper-based rules, rubrics, and 

rationales beyond their breaking points. As the Fisher court observed about the 

ruling in Boyd ninety years earlier, today, many paper-based rules, rubrics and 

rationales have not stood the test of time, especially as time is accelerated by 

developments in technology.34 Simply said, electronic data and its storage are, 

by their nature, intrinsically different than records stored on paper, and the law 

must recognize that difference in order to honor our shared belief in a free 

society, limited only as reasonably required for public safety.

35 Going forward, 

we ask reviewing courts of last resort to consider the following structure for 

resolving decryption requests from law enforcement authorities:

 

34 In 1965, American computer engineer Gordon Moore predicted that the number of transistors in a silicon 

chip would double every year. He later revised this prediction to a doubling of transistors every two years, but 

in reality, the pace has been a doubling every eighteen months. See Moore’s Law, Encyclopædia Britannica

(Nov. 29, 2017), available at https://www.britannica.com/technology/Moores-law. However, the laws of 

both physics and economics have recently brought the continuing validity of Moore’s prediction into 

question. See Tom Simonite, Moore’s Law is Dead. Now What?, MIT Technology Review (May 13, 2016),

https://www.technologyreview.com/s/601441/moores-law-is-dead-now-what/; End of Moore’s Law: It’s Not 

Just About Physics, Scientific American (last visited Aug. 13, 2018), 

https://www.scientificamerican.com/article/end-of-moores-law-its-not-just-about-physics/.

35 We must keep in mind that the Federalist Framers were forced to include a Bill of Rights, including the 

Fourth and Fifth Amendments, by their opponents, the Anti-Federalists, in the state ratification conventions. 

See United States v. Emerson, 270 F.3d 203, 237 (5th Cir. 2001) (noting that the Anti-Federalists wanted the 

United States Constitution, like most of the state Constitutions, to contain a Bill of Rights to prevent the 

federal government from infringing upon the fundamental rights of the people). Without the clear recognition 

of these personal rights, the United States, as we know it, would never have existed.
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 41 of 68

1. Requiring a defendant to decrypt digital data should be legally 

recognized for what it is—coerced recreation of incriminating evidence—

and compulsory process for that purpose should be strictly limited for 

precisely that reason.

2. In some instances, law enforcement officials will have legitimate need of

digital information that is protected by encryption.

3. If the law enforcement request is a bona fide emergency, with verified

concern about the possibility of further and immediate serious criminal 

acts, a warrant that describes the other imminent crime(s) suspected and 

the relevant information sought through a warrant, both with reasonable 

particularity, will likely satisfy Fourth and Fifth Amendment 

requirements.

4. In non-emergency situations, law enforcement should be required to first 

seek the digital data it wants from third parties, such as internet “cloud”

sources, cellphone companies, or internet providers (ISPs), where a 

defendant has practically, if not explicitly, consented to production upon 

legal process from a court of competent jurisdiction.36

5. Exceptions to the Fourth Amendment and its state analogues, such as 

the plain view doctrine and the good faith exception, should be 

 

36 Defendants in criminal cases are entitled to at least the same rights in this regard as are parties in civil 

cases. See Zubulake, 217 F.R.D. at 322.
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 42 of 68

inapplicable to, or strictly limited in, the search and seizure of digital data

stored on devices owned or controlled by that defendant, or from 

“Cloud” subscriptions that defendant owns or uses.

37

Conclusion

[66] Courts will continue to be faced with issues involving the intersection of the law 

and rapidly-emerging technology. Technology moves faster than the law. See, 

e.g., People v. Kramer, 706 N.E.2d 731, 734 (N.Y. 1998). But the principles 

embodied in the Bill of Rights by our Founding Fathers are timeless. See id. 

(“[Technology] cannot be allowed to outpace the array of checks and balances 

and protections affecting [] privacy intrusions, important to individuals and 

society at large[.]”). 

[67] In this case, we apply these founding principles to modern technology and 

conclude that compelling Seo to unlock her iPhone, under the threat of 

contempt and imprisonment, is constitutionally prohibited by the Fifth 

Amendment because revealing or using the passcode to do so is a testimonial 

 

37See Orin S. Kerr, Digital Evidence and the New Criminal Procedure, 105 Colum. L. Rev. 279, 314 (Jan. 2005) 

(suggesting that the plain view doctrine be abolished in computer searches because “computers often must be 

searched comprehensively to locate the evidence sought,” and “the plain view rule threatens to collapse the 

distinction between particular and general warrants. A particular warrant in theory may become a general 

warrant in practice, as all of the evidence in the computer may come into plain view during the course of the 

forensic analysis.”); Orin S. Kerr, Searches and Seizures in a Digital World, 119 Harv. L. Rev. 531, 576 (Apr.

2005) (“[A] tightening of the plain view doctrine may be necessary to ensure that computer warrants that are 

narrow in theory do not become broad in practice.”); see also Orin S. Kerr, Executing Warrants for Digital 

Evidence: The Case for Use Restrictions on Nonresponsive Data, 48 Tex. Tech L. Rev. 1, 21 (2015) (revisiting the 

author’s earlier conclusions and suggesting that “[t]he plain view doctrine might not be the problem, and 

eliminating the plain view exception might not be the answer,” and arguing that the use of non-responsive 

data found during a search instead renders the seizure unreasonable). 
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act. In addition, to date, the State has not met the requirements of the foregone 

conclusion doctrine: to describe with reasonable particularity the information it 

seeks to compel Seo to produce and why. In this non-emergency situation, the 

State should also first seek the evidence it feels it needs to prosecute the crime(s) 

alleged from third-party sources. We therefore reverse the order of the trial 

court finding Seo in contempt and remand for proceedings consistent with this 

opinion.38

[68] Reversed and remanded. 

Riley, J., concurs in result. 

May, J., dissents with opinion. 

 

38 As noted above, our opinion today does not foreclose the possibility of the State continuing the 

prosecution of Seo. See note 21, supra. Furthermore, the State may have other means of discovering the 

contents of Seo’s phone. Although the contents of the phone itself are encrypted, some of the information 

might still be in the possession of third parties, such as the manufacturer of the phone (Apple, as to cellphonenumber-spoofing apps downloaded by Seo) or her service provider (such as AT&T, Verizon, T-Mobile, 

Sprint, etc., as to when text messages were sent). And at least one manufacturer sells a turn-key solution that 

claims to be able to exploit an as-yet unrevealed vulnerability in the iPhone’s passcode lockout feature to 

circumvent the lockout and enable police to brute-force the password. See Thomas Fox-Brewster, Mysterious 

$15,000 ‘GrayKey’ Promises To Unlock iPhone X For The Feds, Forbes (March 5, 2018, 12:10 p.m.),

https://www.forbes.com/sites/thomasbrewster/2018/03/05/apple-iphone-x-graykey-hack/. However, a 

recently released update to the iPhone software apparently thwarts this exploit. See Chris Welch, Apple releases 

iOS 11.4.1 and blocks passcode cracking tools used by police, The Verge (July 9, 2018, 2:17 p.m.),

https://www.theverge.com/2018/7/9/17549538/apple-ios-11-4-1-blocks-police-passcode-cracking-tools. 

This is all the more reason for courts to consider both smartphone users’ privacy rights and the reasonable 

needs of law enforcement in a comprehensive way as soon as possible.
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ATTORNEYS FOR APPELLANT

William J. Webster

Carla V. Garino

Webster Legal, LLC

Westfield, Indiana

ATTORNEYS FOR APPELLEE

Curtis T. Hill, Jr.

Attorney General of Indiana

Ellen H. Meilaender

Supervising Deputy Attorney General

Indianapolis, Indiana 

I N T H E

COURT OF APPEALS OF INDIANA

Katelin Eunjoo Seo,

Appellant-Defendant,

v.

State of Indiana,

Appellee-Plaintiff.

Court of Appeals Case No. 

29A05-1710-CR-2466

May, Judge, dissenting.

[69] When Seo wanted to have charges brought against D.S., she unlocked her cell 

phone and gave it to police so they could download its contents. Only by 

viewing those contents and then talking to D.S. did police learn that charges 

might instead be brought against Seo. Thus, the police already have proof that 

the cell phone in question belongs to Seo and that Seo can open it. Given that 
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 45 of 68

those facts are a foregone conclusion, Seo’s act of producing her unencrypted 

cell phone does not provide an inference of any “incriminating testimony” and, 

therefore, under the specific facts before us, I would hold Seo’s Fifth 

Amendment right against self-incrimination is not being violated by the order 

that she unlock the phone. See, e.g., United States v. Spencer, 2018 WL 1964588 

(N.D. Cal. 2018) (Fifth Amendment not violated by order for Spencer to 

decrypt the device where the State demonstrated, by clear and convincing 

evidence, that Spencer’s ability to decrypt the device is a foregone conclusion). 

Accordingly, I respectfully dissent.

[70] To explain why I reach that conclusion and where my understanding of Fifth 

Amendment jurisprudence diverges from the majority’s opinion, I need to 

address numerous parts of the majority’s analysis.

Privacy and the Fifth Amendment

[71] As the majority notes, modern Fifth Amendment jurisprudence begins with 

Boyd v. United States, 116 U.S. 616 (1886). Slip op. at 15 (discussing Boyd). See 

also Wayne R. LaFave, Jerold H. Israel, Nancy J. King, & Orin S. Kerr, 

Criminal Procedure: The Boyd “principle”, in 3 CRIM. PROC. § 8.12(a) (4th ed., 

Dec. 2017 Update) (hereinafter “LaFave et al., Boyd principle”) (“the Boyd

analysis remains a universally accepted starting point for understanding the 

many strands of current Fifth Amendment doctrine applicable to the subpoena 

duces tecum”). Boyd held “the seizure of a man’s private books and papers to be 

used in evidence against him is [not] substantially different from compelling 
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him to be a witness against himself.” Boyd, 116 U.S. at 633. As LaFave and his 

colleagues explain:

Boyd relied on what has been described as a “property oriented” 

view of the Fourth and Fifth Amendments, built upon the 

owner’s right of privacy in the control of his lawfully held 

possessions. It recognized a special Fifth Amendment interest in 

the privacy of documents, viewing the forced production of their 

contents as equivalent to requiring a subpoenaed party to reveal 

that content through his testimony. . . . [T]he key to the Court’s 

analysis appeared to be invasion through forced production of 

the individual’s privacy interest in his possession of property in 

which the public had no entitlement.

LaFave et al., Boyd principle.

[72] Since that time, however, the Supreme Court has “gradually developed a series 

of doctrines that chipped away at the broad implications of Boyd’s propertyrights/privacy analysis of Fifth Amendment protection,” id., such that “very 

little if anything, remains of Boyd’s Fifth Amendment analysis.” Id. See also 

Carpenter v. United States, 2018 WL 3073916 at *66 (2018) (Gorsuch, J.,

dissenting) (“To be sure, we must be wary of returning to the doctrine of Boyd . . 

. [which] invoked the Fourth Amendment to restrict the use of subpoenas even 

for ordinary business records and, as Justice Alito notes, eventually proved 

unworkable.”). In fact, in 1976, the Supreme Court explicitly rejected the idea 

that the Fifth Amendment was intended to protect private information:

The proposition that the Fifth Amendment protects private 

information obtained without compelling self-incriminating 

testimony is contrary to the clear statements of this Court that 
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under appropriate safeguards private incriminating statements of 

an accused may be overheard and used in evidence, if they are 

not compelled at the time they were uttered; and that disclosure 

of private information may be compelled if immunity removes 

the risk of incrimination. If the Fifth Amendment protected 

generally against the obtaining of private information from a 

man’s mouth or pen or house, its protections would presumably 

not be lifted by probable cause and a warrant or by immunity. 

The privacy invasion is not mitigated by immunity; and the Fifth 

Amendment’s strictures, unlike the Fourth’s, are not removed by 

showing reasonableness. The Framers addressed the subject of 

personal privacy directly in the Fourth Amendment. They struck 

a balance so that when the State’s reason to believe incriminating 

evidence will be found becomes sufficiently great, the invasion of 

privacy becomes justified and a warrant to search and seize will 

issue. They did not seek in still another Amendment the Fifth to 

achieve a general protection of privacy but to deal with the more 

specific issue of compelled self-incrimination.

We cannot cut the Fifth Amendment completely loose from the 

moorings of its language, and make it serve as a general protector 

of privacy a word not mentioned in its text and a concept directly 

addressed in the Fourth Amendment. We adhere to the view 

that the Fifth Amendment protects against “compelled selfincrimination, not (the disclosure of) private information.”

Fisher v. United States, 425 U.S. 391, 400-01 (1976). See also Dan Terzian, The 

Fifth Amendment, Encryption, and the Forgotten State Interest, 61 UCLA L. Rev. 

Discourse 298, 307 (2014) (“Privacy is no longer a Fifth Amendment value.”). 

[73] Because the United States Supreme Court has explicitly rejected the notion that 

the Fifth Amendment is intended to protect any privacy interest in information, 

I find irrelevant my colleagues’ repeated references to the “trove of . . . almost 
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always embarrassing, and potentially, incriminating” information they keep on 

their cell phones. Slip op. at 2-3; see also id. at 1-2 (“The amount of personal 

information contained on a typical smartphone is astounding[.]”); id. at 26 n.20 

(“[G]iven the vast amounts of personal information located on a typical 

smartphone, there should be a reasonable presumption that something

incriminating would be discovered during review of the contents of almost 

anyone’s smartphone.”) (emphasis in original);39 and id. at 36-38 (discussing the 

amount of data processed by and kept on phones). 

Encryption and Its Implications

[74] Part of the reasoning behind the majority’s holding that forcing Seo to unlock 

her phone implicates the Fifth Amendment is because 

her act of unlocking, and thereby decrypting, her phone 

effectively recreates the files sought by the State. . . . In a very 

real sense, the files do not exist on the phone in any meaningful 

way until the passcode is entered and the files sought are 

decrypted. 

 

39 In the same footnote, my colleagues express concern about “the expansive law enforcement claims that 

could be made under the plain view doctrine or the good faith exception to the Fourth Amendment or Article 

1 Section 11 of the Constitution of Indiana protections when searching a smartphone.” Slip op. at 26 n.20. 

While I am not unconcerned about the implications of plain view and good faith when the police are given 

unfettered access to the contents of a citizen’s smartphone, I also recognize that the application of the Fourth 

Amendment is not before us in this appeal and that our decision under the Fifth Amendment ought not be 

conflated with Fourth Amendment concerns. See Carpenter, 2018 WL 3073916 at *13 (“Our decision today is 

a narrow one. We do not express a view on matters not before us.”); and see Fisher, 425 U.S. at 401 (“the 

Fifth Amendment protects against ‘compelled self-incrimination, not (the disclosure of) private 

information’”).
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 49 of 68

Slip op. at 25. I concede that encryption turns readable digital data into digital 

random noise. I cannot, however, agree that decryption constitutes “creation of 

testimony” that should implicate the Fifth Amendment. 

[75] Seo is not being forced, under the penalties of perjury or torture, to download 

new Apps or to write and send new text messages. The evidence being sought 

from Seo’s phone – text messages matching those received by D.S. from phone 

numbers that were not assigned to any identifiable person and identity masking 

applications – already are among the files on Seo’s phone, otherwise they could 

not have been encrypted when Seo locked her phone.40 As such, decryption 

does not use the contents of Seo’s mind to create new information. Instead, preexisting information is simply being rendered intelligible. 

[76] Therefore, in my opinion, the law ought to treat files on a cell phone –

encrypted or not – like prior-produced documents sitting in a file cabinet, which 

do not enjoy Fifth Amendment protection. See United States v. Hubbell, 530 U.S. 

27, 35-36 (2000) (“a person may be required to produce specific documents 

even though they contain incriminating assertions of fact or belief because the 

creation of those documents was not ‘compelled’ within the meaning of the 

privilege”); id. at 36 (“Hubbell could not avoid compliance with the subpoena 

served on him merely because the demanded documents contained 

incriminating evidence, whether written by others or voluntarily prepared by 

 

40 The question of whether the State has probable cause to believe it will find that expected evidence of the 

alleged crimes on Seo’s phone is a Fourth Amendment question that, once again, is not before us in this 

appeal. See supra n. 39. Accordingly, for my analysis, I assume arguendo the evidence exists on her phone. 
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 50 of 68

himself.”); Fisher, 425 U.S. at 409-410 (“the preparation of all of the papers 

sought in these cases was wholly voluntary, and they cannot be said to contain 

compelled testimonial evidence, either of the taxpayers or of anyone else”). See 

also In re Grand Jury Subpoena Duces Tecum Dated March 25, 2011, 670 F.3d 1335, 

1342 (11th Cir. 2012) (“the files, if there are any at all in the hidden portions of 

the hard drives, are not themselves testimonial”).

[77] To hold otherwise as to data on encrypted devices creates an ever-increasingly 

unpoliceable “zone of lawlessness” that could not have been envisioned when 

the Fifth Amendment was adopted. See Dan Terzian, The Micro-Hornbook on the 

Fifth Amendment and Encryption, 104 Geo. L.J. Online 168 (2016) (“The DOJ 

calls encryption a “zone of lawlessness.”); see also Slip op. at 12 (advanced 

security features on modern cellphones render nearly impossible brute force 

attacks on passcodes, such that “if the police want or need to gain access to an 

iPhone, the cooperation of its owner is practically a necessity”). The Fifth 

Amendment, like other portions of the Bill of Rights, was intended to balance 

the government’s interest in policing to maintain the common welfare of the 

people with each individual citizen’s interest in liberty from government 

intrusion. See California v. Byers, 402 U.S. 424, 427 (1971) (Fifth Amendment 

questions “must be resolved in terms of balancing the public need on the one 

hand, and the individual claim to constitutional protections on the other; 

neither interest can be treated lightly.”); see also Terzian, 61 UCLA L. Rev. 

Discourse at 307 (“Forming the Fifth Amendment’s core value, then, is its aim 

to achieve a fair state-individual balance. Where there is a real societal need to 
Court of Appeals of Indiana | Opinion 29A05-1710-CR-2466 | August 21, 2018 Page 51 of 68

limit the privilege, the Court has repeatedly permitted compulsion upon the 

defendant.”). I do not believe the creation of a zone-of-lawlessness outside a 

person’s mind from which individual citizens could commit crimes against 

others without government recourse can be a proper balancing of those 

interests. See generally id. Accordingly, I believe we must find a path forward 

that balances the governmental and individual interests without creating a zone 

of lawlessness from which one citizen may harass another without government 

intervention. See, e.g., Kastigar v. United States, 406 U.S. 441, 445-46 (1972) 

(statutes granting immunity for compelled testimony “seek a rational 

accommodation between the imperatives of the privilege and the legitimate 

demands of government to compel citizens to testify”), reh’g denied. 

Keys, Combinations, and the “Contents of One’s Mind”

[78] As the majority discusses, in 1988, the United States Supreme Court decided a 

citizen’s Fifth Amendment privilege against self-incrimination was not violated 

by an order that compelled him to sign a consent form authorizing foreign 

banks to release any records of accounts in his name to the United States 

government. Doe v. United States, 487 U.S. 201, 219 (1988) (hereinafter “Doe 

2”). Justice Stevens dissented from that decision, arguing that a citizen “may in 

some cases be forced to surrender a key to a strongbox containing incriminating 

documents, but I do not believe he can be compelled to reveal the combination 

to his wall safe—by word or by deed.” Id. at 219 (Stevens, J., dissenting). In 

response, the Court’s majority noted:
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We do not disagree with the dissent that “[t]he expression of the 

contents of an individual’s mind” is testimonial communication 

for purposes of the Fifth Amendment. We simply disagree with 

the dissent’s conclusion that the execution of the consent 

directive at issue here forced petitioner to express the contents of 

his mind. In our view, such compulsion is more like “be[ing] 

forced to surrender a key to a strongbox containing incriminating 

documents” than it is like “be[ing] compelled to reveal the 

combination to [petitioner’s] wall safe.” 

Id. at 210 n.9. 

[79] A majority of the Supreme Court again referenced this key-combination 

dichotomy when it decided Hubbell:

It was unquestionably necessary for respondent to make 

extensive use of “the contents of his own mind” in identifying the 

hundreds of documents responsive to the requests in the 

subpoena. The assembly of those documents was like telling an 

inquisitor the combination to a wall safe, not like being forced to 

surrender the key to a strongbox.

Hubbell, 530 U.S. at 43 (Hubbell’s Fifth Amendment privilege was violated by a 

subpoena that forced him to comb through thousands of documents to find 

those that fit the government’s request.). 

[80] Based on that language from Doe 2 and Hubbell, courts being asked to determine 

whether a citizen could be forced to reveal the passcode for locked electronic 

devices have frequently turned to this key-combination dichotomy and asked 

whether the electronic passcode is more like a key or a combination. Some 

courts have held that a passcode is more like a combination because both are 
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kept in a person’s mind, such that the production of the password would be 

testimonial and is prohibited by the Fifth Amendment.41 See, e.g., United States 

v. Kirschner, 823 F.Supp. 2d 665, 668-9 (E.D. Mich. 2010) (government cannot 

compel disclosure of password because it requires defendant “to divulge 

through his mental processes his password”); In re Boucher, No. 2:06-mj-91, 

2007 WL 4246473, at *4 (D. Vt. Nov. 28, 2007) (“A password, like a 

combination, is in the suspect’s mind, and is therefore testimonial and beyond 

the reach of the grand jury subpoena.”) (hereinafter “Boucher 1”, rev’d, No. 2:06-

mj-91, 2009 WL 424718 (D. Vt. Feb 19, 2009) (enforcing subpoena seeking 

decrypted data, but not the password itself) (hereinafter “Boucher 2”). 

[81] However, at least one commentator on Fifth Amendment jurisprudence argues 

courts ought to reconsider whether to apply this key-combination dichotomy to 

electronic passcodes:

Passwords should not be forced into this key-combination

dichotomy. They are neither a key nor a combination, and Court 

doctrine suggests the dichotomy should not be mechanically 

applied to new unlocking mechanisms. This dichotomy 

developed because keys and combinations have different Fifth 

Amendment implications—only combinations present the danger 

of compelling the creation of evidence. So it follows that new 

unlocking mechanisms with new implications should also be 

treated differently. Passwords for encrypted data present new 

 

41 If, however, the passcode were written down on a piece of paper and placed in a drawer, then production 

of that passcode undoubtedly could be compelled because in those circumstances the passcode is 

indistinguishable from a key. Terzian, 104 Geo. L.J. Online at 169 n.8 (noting “if the password is physically 

recorded somewhere, the government can subpoena the production of that password” but “the subpoena 

won’t yield anything if (when) the defendant responds that there is no written password”). 
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implications in interest balancing and therefore should be treated 

differently. First, consider the interest balancing with safe 

combinations. There, a fair state-individual balance favors the 

individual—and compelled production is prohibited—because 

there is little state need; law enforcement can easily crack a safe 

through its own efforts. Contrast that with passwords. Law 

enforcement usually cannot bypass them, leaving the data 

inaccessible and creating great need for the password or 

decrypted data’s production. 

Terzian, 61 UCLA L. Rev. Discourse at 301-2.

[82] Others have challenged the logic of applying this key-combination dichotomy 

because the government’s ability to open an electronic device should not be 

determined by “whether [someone] protected that drive using a fingerprint key 

or a password composed of symbols.” Spencer, 2018 WL 1964588 at *2. See 

also State v. Stahl, 206 So.3d 124, 135 (Fla. Ct. App. 2016) (“we are not inclined 

to believe that the Fifth Amendment should provide greater protection to 

individuals who passcode protect their iPhones with letter and number 

combinations than to individuals who use their fingerprint as the passcode”). 

As the majority notes, there is little doubt that the government could compel a 

citizen to display a physical characteristic, even if that characteristic might be 

incriminating, because it is not testimonial. Slip op. at 14 n.14.42 Thus, 

arguably, courts could compel citizens to open an electronic device that is 

 

42 The majority then asserts this reasoning is “outdated and ironic when compared with” modern electronic 

scanning mechanisms. Slip op. at 14 n.14. The majority does not explain how or why advanced scanning 

equipment should lead courts to overturn the long-standing rule that physical characteristics are not 

testimony, and I thus cannot agree with the majority that this rule is “outdated and ironic.” Id. 
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unlocked by fingerprint, retinal scan, or face scan, because production of those 

physical characteristics is not “testimony” prohibited by the Fifth Amendment. 

See Schmerber v. California, 384 U.S. 757, 764 (1966) (physical evidence can be 

compelled and Fifth Amendment does not protect against the compulsion to 

provide fingerprints); Hubbell, 530 U.S. at 34-5 (“[E]ven though the act may 

provide incriminating evidence, a criminal suspect may be compelled to put on 

a shirt, to provide a blood sample or handwriting exemplar, or to make a 

recording of his voice.”) (footnotes omitted); United States v. Hook, 471 F.3d 766, 

773-74 (7th Cir. 2006) (“[T]he taking of blood samples or fingerprints is not 

testimonial evidence and as such is not protected by the Fifth Amendment.”), 

cert. denied. 549 U.S. 1343. 

[83] The majority herein decides: “under the precedent as it now exists, we hold that 

the State is seeking the electronic equivalent to a combination to a wall safe—

the passcode to unlock the iPhone.” Slip op. at 22. I do not believe the 

precedent compels the result the majority reaches, because while a passcode is 

similar to a combination, an electronic device arguably is materially 

distinguishable from a wall safe. Nor do I believe the majority ought to be 

deciding an issue that is not before us today, as Seo has not been asked to reveal 

her password. See Carpenter, 2018 WL 3073916 at *13 (“Our decision today is a 

narrow one. We do not express a view on matters not before us. . . . As Justice 

Frankfurter noted when considering new innovations in airplanes and radios, 

the Court must tread carefully in such cases, to ensure that we do not 

‘embarrass the future.’”). I accordingly dissent from the majority’s 
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unnecessarily holding a passcode is the equivalent of a combination to a wall 

safe. 

[84] The trial court instead ordered Seo to produce the decrypted device. The 

Eleventh Circuit considered whether forced decryption was testimonial and 

determined it too was compelled testimony prohibited by the Fifth Amendment 

because “the decryption and production of the hard drives would require the 

use of the contents of Doe’s mind and could not be fairly characterized as a 

physical act that would be nontestimonial in nature.” In re Grand Jury Subpoena 

Duces Tecum Dated March 25, 2011, 670 F.3d at 1346. 

[85] This Eleventh Circuit holding has been challenged on two grounds:

First, it misreads Supreme Court dicta. The dicta regards only 

compelling production: The government can compel the 

production of keys but not the production of combinations. It’s 

silent on whether the government can compel unlocking (i.e., 

forcing a person to enter a combination without producing a 

copy). This silence, coupled with the dicta’s rationale, suggests 

that compelling unlocking may be constitutional. The reason for 

the Court distinguishing between key- and combinationproductions stems from the Court’s concern over compelled 

creation. Combinations may not exist outside a person’s mind, 

so producing them would require compelling the creation of a 

physical version, and it is this compelled creation that makes the 

response testimonial. There are no such compelled creation 

concerns with compelled unlocking through forced decryption—

the data is already there, the person just needs to unlock it; and 

unlocking it does not require creating a physical copy of the 

password.
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The second stumble comes in the Eleventh Circuit’s analysis of 

mental effort. Entering an oft-used password requires no more 

mental effort than finding a key. You remember the key’s 

location and then find it, just as you remember the password and 

then input it.

Dan Terzian, Forced Decryption as Equilibrium—Why It’s Constitutional and How 

Riley Matters, 109 Nw. U. L. Rev. Online 56, 59-60 (2014).43 

[86] The majority herein explicitly rejects the State’s attempt to distinguish 

production of the passcode from production of the unlocked device “because 

the end result is the same: the State is compelling Seo to divulge the contents of 

her mind.” Slip op. at 25. By so holding, the majority has fallen into the first 

“stumble” noted above – Seo is not being required to “divulge” anything from 

her mind. Just the opposite, she is unlocking the device without revealing the 

contents of her mind, and to the extent she is required to use her mind to do so, 

the mental effort is no greater than the mental effort required to locate and 

 

43 Elsewhere, Terzian objected to the Eleventh Circuit’s decision thus:

[The Eleventh Circuit] addressed the question of whether the Fifth Amendment bars the 

compelled decryption and production of the now-unencrypted data. It held affirmatively 

and explicitly framed the issue within this dichotomy, finding compelled decryption “most 

certainly more akin to requiring the production of a combination.”

This reasoning ignores a pivotal prefatory question: Do passwords even belong in this 

dichotomy? A computer password is not a safe combination. Sure, they are similar, but 

that does not mean they must be treated the same. Combinations and keys are similar—

both unlock safes—yet they are treated differently because only the former implicated 

compelled creation concerns.

It follows, then, that courts should treat passwords and combinations differently if they 

have meaningfully different Fifth Amendment implications. And they do. Passwords and 

encrypted data implicate fair balancing concerns that support permitting compelled 

production, while combinations do not. 

Terzian, 61 UCLA L. Rev. Discourse at 306. 
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produce a key to a file cabinet. For these reasons, I would hold the only selfincrimination ground for challenging the compelled production of an unlocked 

and decrypted electronic device “lies in the testimonial aspects of the act-ofproduction,” just as it does with the production of preexisting papers. Wayne 

R. LaFave, Jerold H. Israel, Nancy J. King, & Orin S. Scott, The Schmerber rule,

3 CRIM. PROC. § 8.12(d) n.48 (4th ed. Dec. 2017 Update) (hereinafter “LaFave 

et al., Schmerber rule”). And it is to this issue that I turn next. 

Act of Production, Foregone Conclusion, & Reasonable Specificity

[87] The act of producing a decrypted device might itself be protected by the Fifth 

Amendment. See Hubbell, 530 U.S. at 37 (“Whether the constitutional privilege 

protects . . . the act of production itself . . . is a question that is distinct from the 

question whether the unprotected contents of the documents themselves are 

incriminating.”). To explain why I do not believe Seo’s production of her 

decrypted iPhone implicates Fifth Amendment concerns, I begin with a 

discussion of the relevant case law.

[88] Our country’s Highest Court explained:

The act of producing evidence in response to a subpoena 

nevertheless has communicative aspects of its own, wholly aside 

from the contents of the papers produced. Compliance with the 

subpoena tacitly concedes the existence of the papers demanded 

and their possession or control by the taxpayer. It would also 

indicate the taxpayer’s belief that the papers are those described 

in the subpoena. The elements of compulsion are clearly present, 

but the more difficult issues are whether the tacit averments of 

the taxpayer are both “testimonial” and “incriminating” for 
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purposes of applying the Fifth Amendment. These questions 

perhaps do not lend themselves to categorical answers; their 

resolution may instead depend on the facts and circumstances of 

particular cases or classes thereof. 

Fisher, 425 U.S. at 410 (internal citation omitted). 

[89] In Fisher, the government subpoenaed tax preparation documents that had been 

produced by an accountant and were in the accountant’s files. The Court noted 

the Fifth Amendment did not apply to the documents themselves “because the 

documents were created voluntarily and the Government had not compelled 

their creation.” Jeffrey Kiok, Missing the Metaphor: Compulsory Decryption and the 

Fifth Amendment, 24 B.U. Pub. Int. L.J. 53, 61 (Winter 2015) (citing Fisher, 425 

U.S. at 410 n.11). The Fisher Court determined “the act of producing [the 

papers] would not itself involve testimonial self-incrimination.” 425 U.S. at 

411. 

The papers belong to the accountant, were prepared by him, and

are the kind usually prepared by an accountant working on the 

tax returns of his client. Surely the Government is in no way 

relying on the “truth-telling” of the taxpayer to prove the 

existence of or his access to the documents. The existence and 

location of the papers are a foregone conclusion and the taxpayer 

adds little or nothing to the sum total of the Government’s 

information by conceding that he in fact has the papers. Under 

these circumstances by enforcement of the summons “no 

constitutional rights are touched. The question is not of 

testimony but of surrender.”

Id. (internal citations omitted). 
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[90] That holding by the Fisher Court created what has become known as the 

foregone conclusion standard, which has been described thus:

Where the existence and possession of the documents to be 

produced are a “foregone conclusion,” the act of production 

similarly “adds little or nothing to the sum total of the 

government’s information” and therefore is no more testimonial 

than other compelled physical acts. The government in such a 

case obviously is not seeking the assertions of the subpoenaed 

party as to the facts of existence and possession, and his 

incidental communication as to those facts, inherent in the 

physical act that the government had the authority to compel, 

therefore does not rise to the level of compelled “testimony.” 

Wayne R. LaFave, Jerold H. Israel, Nancy J. King, & Orin S. Kerr, Testimonial 

character and the foregone conclusion standard, 3 CRIM. PROC. § 8.13(a) (4th ed. 

Dec. 2017 Update) (hereinafter “LaFave et al., Foregone Conclusion”). 

[91] In United States v. Doe, 465 U.S. 605, 613 (1984) (hereinafter, “Doe 1”), the 

Supreme Court was again asked to decide whether the act of producing 

documents would violate a citizen’s Fifth Amendment right. The District 

Court had found “enforcement of the subpoenas would compel [respondent] to 

admit that the records exist, that they are in his possession, and that they are 

authentic.” Id. at 613 n.11. The Supreme Court noted it could “not over turn 

that finding unless it has no support in the record.” Id. at 614. Based thereon, 

the Supreme Court held Doe’s act of producing the subpoenaed documents to 

be protected by the Fifth Amendment privilege against self-incrimination. Id. at 

614. 
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Subsequent to Doe [1], lower court rulings generally insisted that 

the foregone conclusion standard be met by the government 

“demonstrat[ing] with reasonable particularity that it knows of 

the existence and location of subpoenaed documents.” Those 

rulings recognized, however, that there are a variety of ways in 

which such a demonstration may be made. These include: some 

prior action by the subpoenaed party acknowledging that the 

particular documents existed and were in his possession; 

identification of some person (as in the case of the accountants in 

Fisher) who can testify that the particular documents were 

previously in the possession of the subpoenaed party; documents 

or similar evidence in the government’s possession which would 

indicate that the subpoenaed documents exist and are in the 

subpoenaed person’s possession; and the fact that the documents 

are of a type regularly sent to the subpoenaed person by another 

doing business with that person, combined with absence of any 

dispute as to whether he received such documents. Similarly, as 

to authentication, courts held that the foregone conclusion 

standard is met where the government can point to another 

person (e.g., the preparer of the document) who can authenticate, 

or where authentication can be achieved by other means (e.g., 

comparison with other documents independently authenticated 

or matching the handwriting with that of the subpoenaed party). 

As with existence and possession, the government must point to 

a specific avenue of authentication “by means independent of the 

producer’s act of production. To merely state that [the 

government] will not utilize the act of production would amount 

to no more than an informal offer of immunity, which Doe [1]

rejected as an inappropriate grounding for enforcing the 

subpoena.

LaFave et al., Foregone Conclusion (footnotes omitted).

[92] Then, in Hubbell, the Supreme Court was asked to decide “whether the Fifth 

Amendment privilege protects a witness from being compelled to disclose the 
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existence of incriminating documents that the Government is unable to describe 

with reasonable particularity[.]” Hubbell, 530 U.S. at 29-30 (footnote omitted). 

There, the governments subpoenaed eleven categories of documents from a 

grand jury witness, Hubbell. Hubbell invoked his Fifth Amendment privilege 

and refused to admit whether he had such documents. The prosecutor then 

promised Hubbell immunity, and Hubbell produced 13,120 pages of documents 

and testified those were all the documents in his control that were requested by 

the subpoena.44 Id. at 31. Based on the information in those documents, the 

government brought a second set of charges against Hubbell for crimes the 

government had not been investigating when Hubbell responded to the 

subpoena. Instead, the government had discovered those crimes by studying 

the contents of the documents Hubbell produced. Id. at 32. 

[93] The Supreme Court noted:

[W]hen the custodian of documents responds to a subpoena, he 

may be compelled to take the witness stand and answer questions 

designed to determine whether he has produced everything 

demanded by the subpoena. The answers to those questions, as 

well as the act of production itself, may certainly communicate 

information about the existence, custody, and authenticity of the 

documents. 

 

44 All, that is, except those protected by attorney-client privilege or work-product privilege. Hubbell, 530 U.S. 

at 31.
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Id. at 37. The Court then held Hubbell’s act of production had a testimonial 

aspect because the government had not demonstrated the testimony produced 

was a foregone conclusion:

Whatever the scope of this “foregone conclusion” rationale, the 

facts of this case plainly fall outside of it. While in Fisher the 

Government already knew that the documents were in the 

attorneys’ possession and could independently confirm their 

existence and authenticity through the accountants who created 

them, here the Government has not shown that it had any prior 

knowledge of either the existence or the whereabouts of the 

13,120 pages of documents ultimately produced by respondent. 

Id. at 44-45. 

[94] Because Hubbell did not clarify the scope of the foregone conclusion standard, 

lower courts have continued to struggle with determining whether an act of 

production is both testimonial and incriminating based “on the facts and 

circumstances of particular cases.” Fisher, 425 U.S. at 410. Courts have 

especially had difficulty when applying this standard to compulsory decryption 

of an electronic device, “often reconsidering and overturning their own prior 

orders when faced with changing facts, or facts that were not well-understood in 

the first place.” Kiok, 24 B.U. Pub. Int. L.J. at 65. 

[95] The majority’s review of the parties’ arguments provides citation to many of 

these cases, with parentheticals describing the various holdings, so I need not 

repeat all of them here. See Slip op. at 29-31. Instead, I provide this summary:
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A defendant’s ability to invoke the Fifth Amendment in the 

context of a compulsory order to decrypt will depend on the 

foregone conclusion doctrine and events that in all likelihood 

long preceded the subpoena or warrant. The foregone conclusion 

doctrine will permit the Government to compel a defendant 

when the Government can otherwise prove that the hard drive 

and its data was the sole property of the defendant. If a 

defendant confesses to possession of the drive, that may suffice. 

If the Government can view some portion of the hard drive and 

determine that the files belonged to one individual, that too may 

suffice.

Kiok, 24 B.U. Pub. Int. L.J at 77-78 (footnotes omitted). 

[96] Herein, the majority holds that

what the State seeks to compel is not merely the password, but 

the entire contents of Seo’s iPhone. Thus, for the foregone 

conclusion rationale to apply, the State must be able to describe 

with reasonable particularity the discrete contents on Seo’s 

phone—e.g., all texts to D.S. created on Seo’s iPhone—that it is 

compelling her to not only produce, but to re-create by entering 

her passcode and decrypting the contents of the phone. This is a 

burden the State has not met.

Slip op. at 31 (emphasis in original).

[97] However, in so holding, the majority has followed authority that, I believe, 

misapplies the foregone conclusion doctrine to electronic devices.45 The State 

 

45 In addition, the majority’s holding relies on a premise that I do not accept – that the contents of a 

decrypted electronic device are the equivalent of testimony created by compulsion. See supra Encryption and 

Its Implications.
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has not presented Seo with a subpoena requiring her to produce each text 

message she sent to D.S., such that Seo must, like Hubbell, use her mind to 

discern which text messages fit within the categories of messages requested and 

then testify that she produced all relevant requested evidence. See Hubbell, 530 

U.S. at 45 (“the Government has not shown that it had any prior knowledge of 

either the existence or the whereabouts of the 13,120 pages of documents 

ultimately produced by respondent”). Nor has Seo been ordered to sort 

through thousands of electronic devices in her possession to produce those 

devices that contain the requested evidence. 

[98] Instead, the State has asked Seo to unlock a file cabinet so that the State may 

search within that file cabinet for evidence of specific crimes the State is already 

investigating. The State’s right to access such a file cabinet will undoubtedly 

require a Fourth Amendment showing of probable cause to believe the 

particular evidence sought will exist within that cabinet. See U.S. Const. 

amend. IV (“no Warrants shall issue, but upon probable cause, supported by 

Oath or affirmation, and particularly describing the place to be searched, and 

the persons or things to be seized”). But the validity under the Fourth 

Amendment of the order for Seo to open her phone is not before us, and the 

Fifth Amendment does not require the State to demonstrate in advance “the 

discrete contents” of the evidence that will be found in a cabinet,46 see United 

 

46 Even if I could agree with my colleagues that the reasonable particularity standard required the State to 

make a showing, with reasonable particularity, of the evidence it expects to find within the electronic device 

being sought, I would be hesitant to hold, based on the record before us, that the State had not met that 
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States v. Fricosu, 841 F.Supp.2d 1232, 1237 (D. Col. 2012) (“[T]he government 

knows of the existence and location of the computer’s files. The fact that it 

does not know the specific content of any specific documents is not a barrier to 

production[.]”), because the Fifth Amendment does not protect the content of 

the documents. See Fisher, 425 U.S. at 409 (“the Fifth Amendment would not 

be violated by the fact alone that the papers on their face might incriminate the 

taxpayer, for the privilege protects a person only against being incriminated by 

his own compelled testimonial communications”). 

 

standard herein. At the hearing on the State’s motion for rule to show cause, Detective Inglis testified that 

Seo initially used her own phone number to contact D.S.; however,

[t]hen the contact to [D.S.] started coming from more random phone numbers that when I 

would try and research the phone number to find out who it belonged to, or who it was 

assigned to, there was no record of it being assigned to anybody and the numbers would 

change. He would get a dozen or 30 phone calls or texts from one number and then the 

next day it would be a different number but it would obviously be conversations that were 

linked with the same. 

(Tr. at 7.) D.S. was contacted by “dozens of phone numbers.” (Id.) Detective Inglis said “it appeared that 

she was using an ap [sic] or an internet program such as Google Voice or Pinger to disguise her phone 

number so that it wouldn’t show up in his caller ID.” (Id. at 8.) The State asked Detective Inglis if he had 

subpoenaed the Apps or Internet services that could mask identity, and he testified:

There are numerous, and there’s probably some that I’m not even aware of, numerous 

entities out there like Google Voice and Pinger and Text Now and Text Me, and I don’t 

know, I don’t have an all-encompassing list of them, however if I had the phone I could see 

which ones she had accessed.

(Tr. at 12.) Thus, it seems self-evident the State is seeking evidence on Seo’s phone of an App or multiple 

Apps that would allow her to mask her identity and evidence that Seo’s phone had generated the phone calls 

and texts that D.S. received from phone numbers that did not belong to any other person. 

Also troubling for me is the majority’s insistence “the State has not described with reasonable particularity 

the digital files or data it seeks to compel,” (Slip op. at 33 n.25; and see id. at 32), when the Record provided to 

us on Appeal does not contain any of the documentation or testimony provided to the trial court before the 

search warrant was issued. I acknowledge “the warrant itself does not describe with any particularity the 

digital information the State seeks to compel,” (id. at 33), but I would not infer from the absence of such 

description in the warrant that the evidence is likewise absent from portions of the Record that Seo has not 

provided to us. 
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[99] Because of this material distinction between the order in Hubbell and this order 

to open an iPhone, the only testimony being implied by Seo’s act of decrypting 

the phone is that the phone is hers and she has the ability to unlock it.47 These 

are facts the State can already prove by “clear and convincing evidence,” 

Spencer, 2018 WL 1964588 at *3 (“The appropriate standard is instead clear and 

convincing evidence. This places a high burden on the government to 

demonstrate that the defendant’s ability to decrypt the device at issue is a 

foregone conclusion.”), because Seo has already unlocked the phone for police 

when she gave it to them to download, the investigating officer had called Seo 

at the phone number associated with the phone in question, and Seo admitted 

the phone was hers when she was arrested. As such, Seo’s act of production 

does “not itself involve testimonial self-incrimination.” Fisher, 425 U.S. at 411; 

see Spencer, 2018 WL 1964588 (foregone conclusion applies where defendant 

admitted buying and encrypting external hard drive matching one found in his 

house); Friscosu, 841 F. Supp. 2d at 1236-37 (foregone conclusion applies where 

State knows computer belongs to defendant and knows she has password). 

In Summary

[100] The Fifth Amendment is intended to prohibit the government from compelling 

incriminating testimony, not to protect the privacy of personal information. 

The Fifth Amendment could not have been intended to create a zone-of-

 

47 Moreover, it is unnecessary to “ask whether the government has established with ‘reasonable particularity’ 

that the defendant is able to decrypt a device. . . . [A] defendant’s ability to decrypt is not subject to the same 

sliding scale. He is either able to do so, or he is not.” Spencer, 2018 WL 1964588 at *3. 
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lawlessness outside a person’s mind that the government would be unable to 

police to maintain the safety of all citizens. While decrypting an electronic 

device requires the use of the contents of the owner’s mind, the task requires 

such little mental effort that I would hold the only Fifth Amendment barrier to 

production of the decrypted device is if the act of production itself implies 

incriminating testimony. The act of production cannot, however, produce 

incriminating testimony when the facts confirmed by that decryption – that the 

citizen owns the device and has the ability to decrypt it – are a foregone 

conclusion because the government already has clear and convincing evidence 

of those facts. 

[101] As Seo unlocked her phone for police on another occasion, as police had 

contacted Seo on that phone, and as Seo admitted the phone was hers when she 

was arrested, I would hold Seo’s possession and ability to decrypt the phone are 

foregone conclusions. Seo therefore can be compelled to decrypt her phone 

without infringing the Fifth Amendment. 

[102] For all these reasons, I respectfully dissent.