Document:

NEITHER THIS NOTE NOR THE SECURITIES ISSUABLE UPON CONVERSION HEREOF HAVE BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, NOR UNDER ANY STATE
SECURITIES LAW AND MAY NOT BE PLEDGED, SOLD, ASSIGNED OR TRANSFERRED UNLESS (i)
A REGISTRATION STATEMENT WITH RESPECT THERETO IS EFFECTIVE UNDER THE SECURITIES
ACT OF 1933, AS AMENDED, AND ANY APPLICABLE STATE SECURITIES LAW REQUIREMENTS
HAVE BEEN MET OR (ii) EXEMPTIONS FROM THE REGISTRATION REQUIREMENTS UNDER THE
SECURITIES ACT OF 1933, AS AMENDED, AND THE REGISTRATION OR QUALIFICATION
REQUIREMENTS OF APPLICABLE STATE SECURITIES LAW ARE AVAILABLE.

                                 PROMISSORY NOTE
                                  (CONVERTIBLE)

$55,000.00                                               December 20, 2003
                                                         Scottsdale, Arizona

     FOR VALUE RECEIVED, the undersigned DynaSig Corporation, an Arizona
corporation ("BORROWER" or "DynaSig"), promises to pay to the order of Milestone
Equity Partners Phoenix, LLC, or his designee ("PAYEE" or "Milestone"), the
principal sum of Fifty Five Thousand and 00/100 Dollars ($55,000.00), as full
payment and for the mutual release of the Consulting Agreement with Milestone
dated June 20, 2003 (the "Contract") and the Purchase Warrant to Milestone dated
June 20, 2003 (the "Warrant").  Such principal is payable on December 20, 2005.

     Borrower's obligations under this Note shall be referred to herein as
"Borrower's Liabilities."  Time is of the essence of this Note and each of the
provisions hereof.

     Borrower represents and warrants to Payee that:  (1) Borrower is duly
incorporated, validly existing and in good standing under the laws of the State
of Arizona; (2) all necessary corporate action has been taken on behalf of the
Borrower by its officers, directors and shareholders in order for the Borrower
to execute, deliver and perform under this Note and any documents executed by
Borrower in connection herewith (collectively, the "Related Documents"); (3) the
execution, delivery and performance of this Note and the Related Documents does
not violate any provision of any charter document of Borrower or any agreement
or instrument by which the Borrower is bound; and (4) this Note and the Related
Documents constitute valid and legally binding obligations of the Borrower
enforceable in accordance with their respective terms.

     In the event that Borrower shall (i) close an equity financing transaction,
or other reorganization transaction, infusing the aggregate sum of five hundred
thousand dollars ($500,000.00) or more into Borrower, or (ii) close a
transaction providing for the sale or merger of substantially all of the assets
of Borrower, Payee shall have the right in its sole discretion, provided such
transaction closes prior to payment in full of Borrower's Liabilities, to
convert all of the outstanding principal at the date of such closing into shares
of Common Stock at the same price paid and on the same terms received by the
equity financing.  Borrower shall give Payee thirty (30) days prior written
notice of the anticipated close and the material terms of a transaction meeting
the foregoing description. The principal so converted shall be deemed fully
paid, and interest shall not thereafter accrue on such amounts.  The Payee's
right to convert this Note into Common Stock is conditioned upon Payee entering
into or executing such purchase documents as the other purchasers of Common
Stock executed and meeting the conditions and being subject to the terms
applicable to such other purchasers.  Payee shall immediately surrender this
Note to the Company for cancellation in connection with any conversion hereof.

     The occurrence of any one of the following events shall constitute a
default by the Borrower ("Event of Default") under this Note:  (a) Borrower
fails to pay any of Borrower's Liabilities when due and payable or declared due
and payable (whether by scheduled maturity, required payment, acceleration,
demand or otherwise); (b) Borrower fails or neglects to perform, keep or observe
any term, provision, condition, covenant, warranty or representation contained
in this Note; or (c) Borrower becomes insolvent or generally fails to pay or
admits in writing its inability to pay debts as they become due, a petition
under Title 11 of the United States Code or any similar law or regulation is
filed by or against Borrower; Borrower shall make an assignment for the benefit
of creditors; a custodian, receiver or trustee is appointed to take possession
of any assets of Borrower; any case or proceeding is filed by or against
Borrower for its dissolution or liquidation; or Borrower is enjoined, restrained
or in any way prevented by court order from conducting all or any material part
of its business affairs.

     Upon the occurrence of an Event of Default, at Payee's option and with
notice by Payee to Borrower, all of Borrower's Liabilities shall be immediately
due and payable.  All of Payee's rights and remedies under this Note are
cumulative and non-exclusive.

     If any payment becomes due and payable on a Saturday, Sunday or legal
holiday under the laws of the State of Arizona, the due date of such payment
shall be extended to the next business day.

     The acceptance by Payee of any partial payment made hereunder after the
time when any of Borrower's Liabilities become due and payable will not
establish a custom, or waive any rights of Payee to enforce prompt payment
thereof.  Payee's failure to require strict performance by Borrower of any
provision of this Note or any related document shall not waive, affect or
diminish any right of Payee thereafter to demand strict compliance and
performance therewith.  Any waiver of an Event of Default shall not suspend,
waive or affect any other Event of Default.  Borrower and every endorser waive
presentment, demand and protest and notice of presentment, protest, default,
non-payment, maturity, release, compromise, settlement, extension or renewal of
this Note, and hereby ratify and confirm whatever Payee may do in this regard.
Borrower further waives any and all notice or demand to which Borrower might be
entitled with respect to this Note by virtue of any applicable statute or law
(to the extent permitted by law).

     In addition to principal and interest, Payee shall be entitled to collect
all costs, including, but not limited to, all costs of collection and reasonable
attorneys' fees incurred in connection with any of Payee's collection or
enforcement efforts, whether or not suit on this Note or any related document is
filed, and all such costs and expenses shall be payable on demand.  To the
extent not paid, the same shall become part of Borrower's Liabilities.

     Any and all notices, requests, consents and demands required or permitted
to be given hereunder shall be in writing and shall be deemed given and received
upon personal delivery or upon facsimile with confirmation receipt, or three (3)
business days after deposit in the United States mail, by certified or
registered mail, postage prepaid and addressed as follows:

     To Payee:           Milestone Equity Partners Pheonix, LLC
                         c/o Dawn Donovan
                         7600 East Double tree Ranch Road
                         Suite 300
                         Scottsdale, AZ  85258-2137
                         Fax No. 480-367-7413

     To the Borrower,    DynaSig Corporation
                         Richard Kim
                         11445 E Via Linda
                         Suite 2 PMB 472
                         Scottsdale, AZ  85259
                         Fax No. 480-614-9262

Any party may change, by notice, the address to which notices to it are to be
addressed.

     In connection with the issuance of this Note (this Note, and securities
issued upon conversion hereof, collectively, the "Securities"), Payee hereby
further agrees, represents and warrants as follows:  (i) Payee is acquiring the
Securities solely for its own account for investment and not with a view to or
for sale or distribution of the Securities or any portion thereof and (ii) Payee
is an "accredited investor" within the meaning of Regulation D promulgated under
the Securities Act.

     If any provision of this Note or the application thereof to any party or
circumstance is held invalid or unenforceable, the remainder of this Note and
the application thereof to other parties or circumstances will not be affected
thereby, the provisions of this Note being severable in any such instance.

     All terms, conditions and agreements herein are expressly limited so that
in no contingency or event whatsoever, whether by reason of advancement of the
proceeds hereof, acceleration of maturity of the unpaid principal balance
hereof, or otherwise, shall the amount paid or agreed to be paid to the holders
hereof for the use, forbearance or detention of the money to be advanced
hereunder exceed the highest lawful rate permissible under applicable laws.  If,
from any circumstances whatsoever, fulfillment of any provision hereof shall
involve transcending the limit of validity prescribed by law which a court of
competent jurisdiction may deem applicable hereto, then ipso facto, the
obligation to be fulfilled shall be reduced to the limit of such validity, and
if under any circumstances the holder hereof shall ever receive as interest an
amount which would exceed the highest lawful rate, such amount which would be
excessive interest shall be applied to reduction of the unpaid principal balance
due hereunder and not to the payment of interest.

     Borrower's Liabilities under this Note are secured by the assets of the
Borrower.

     This Note shall be governed and controlled by the internal laws of the
State of Arizona as to interpretation, enforcement, validity, construction,
effect and in all other respects.

     No modification, waiver, estoppel, amendment, discharge or change of this
Note or any related instrument shall be valid unless the same is in writing and
signed by the party against which the enforcement of such modification, waiver,
estoppel, amendment, discharge or change is sought.

BORROWER:
DYNASIG CORPORATION

By:     /s/ Richard C. Kim
        ------------------
Title:  President
        ---------FIRST AMENDMENT TO THE CONSULTING SERVICES AGREEMENT

     This First Amendment to the Consulting Services Agreement Dated June 17,
2003 (this "Agreement") is made and entered into effective as of the 1st day of
January 2004, by and between DynaSig Corporation, an Arizona corporation with a
place of business at 4343 N. Scottsdale Rd., Ste 200, Scottsdale, AZ 85251
("DynaSig"), and OptiSense Corporation, a Delaware corporation with a place of
business at 11445 E. Via Linda, Ste 2 pmb 472, Scottsdale, AZ 85259 ("OSC").

                                    RECITALS

A.     WHEREAS, OSC is in the business of providing certain consulting services
to clients.

B.     WHEREAS, OSC and DynaSig entered into a Consulting Services Agreement
effective June 7, 2003 (the "Original Agreement") regarding the business of
biometric signature authentication (the "Business").

C.     WHEREAS, the Original Agreement restricts OSC's reimbursement of
extraordinary out-of-pocket expenses without specific approval by DynaSig.

D.     WHEREAS, DynaSig desires OSC to incur extraordinary out of pocket
expenses that OSC desires to be reimbursed for.

E.     WHEREAS, the Original Agreement requires DynaSig's specific approval of
such expenses.

                                   AGREEMENTS

     Now, therefore, in consideration of the promises and mutual agreements set
forth herein, DynaSig and OSC hereby agree as follows:

1.     EXTRAORDINARY EXPENSE APPROVAL

     During the remaining term of the Original Agreement, OSC shall provide two
technical employees at the reimbursable compensation listed on Exhibit A (the
"Employees").  OSC is solely responsible for determining any replacement for the
Employees and the manner in which the Services are to be provided; provided,
however, that OSC shall provide the Services in accordance with standards
reasonably acceptable to DynaSig.

2.     OSC'S COVENANTS

     (a)     The Employees with all applicable laws and regulations of any
jurisdiction in which Services are provided and with all applicable DynaSig
rules, policies and standards.

     (b)     The Employees will comply at all times with all security provisions
in effect from time to time at DynaSig's premises with respect to access to
premises and materials and information belonging to DynaSig.

3.     CONFIDENTIALITY

     During the course of performance of this Agreement, the Employees may be
given access to information (regardless of whether in oral, written, electronic,
digital, magnetic or other form or media) that relates to the other's past,
present, and future research, development, business activities, customers,
products, services, and technical knowledge, and has been identified as
proprietary or confidential ("Confidential Information"). In connection
therewith, the following subsections shall apply:

     (a)     Confidential Information of the other party may be used by the
Employees only in connection with the Services.

     (b)     The Employees will execute agreements with DynaSig to protect the
confidentiality of the Confidential Information of the other in the same manner
that it protects the confidentiality of its own proprietary and confidential
information of like kind.

     (c)     Confidential Information may not be copied or reproduced without
the DynaSig's prior written consent.

     (d)     All Confidential Information made available hereunder, including
copies thereof (regardless of whether in written, electronic, digital, magnetic
or other form or media), shall be returned or destroyed (including deleting such
information from all computer systems) upon the first to occur of (i)
termination of this Agreement or (ii) if requested by DynaSig

     (e)     Nothing in this Agreement shall prohibit or limit either party's
use of information (including, but not limited to, ideas, concepts, know-how,
techniques, and methodologies) (i) previously known to it without obligation of
confidence, (ii) independently developed by it, (iii) acquired by it from a
third party which is not, to its knowledge, under an obligation of confidence
with respect to such information, or (iv) which is or becomes publicly available
through no breach of this Agreement.

     (f)     In the event either party receives a subpoena or other validly
issued administrative or judicial process requesting any portion of the
Confidential Information of the other party, it shall promptly notify the other
party and tender to it defense of such demand. Unless the demand shall have been
timely limited, quashed or extended, the recipient shall thereafter be entitled
to comply with such subpoena or other process to the extent permitted by law. If
requested by the disclosing party, the recipient shall cooperate (at the expense
of the disclosing party) in the defense of a demand.

4.     INDEPENDENT CONTRACTOR

     Supplying the Employees shall not impact OSC's status an independent
contractor and OSC acknowledges, and confirms to DynaSig, its status as that of
an independent contractor.  However, DynaSig shall be solely responsible for the
reimbursement of any and all employment related taxes, insurance and employee
benefits with respect to the Employees.

5.     OTHER ORIGINAL AGREEMENT TERMS NOT AMMENDED

     All other terms of the Original Agreement remain the same with the
exception of the significant expense reimbursement agreed to in this Agreement.

     In witness whereof, the parties have duly executed this Agreement as of the
day and year first above written.

DYNASIG CORPORATION          OPTISENSE CORPORATION

/s/ Richard C. Kim          /s/ Richard C. Kim
By:  Richard Kim          By:  Richard C. Kim
----------------          -------------------
Its:  President          Its:  Chief Executive Officer and President

<PAGE>

                      EXHIBIT A - EMPLOYEES AND LIMITATIONS

Employee:     Timothy Lee

Compensation:     $2,500 per month

Benefits:     None

Taxes:     All payroll taxes to be paid by DynaSig

====================================================================

Employee:     B. K. Rho

Compensation:     $3,000 per month

Benefits:     Medical benefits not to exceed $550 per month to be paid by
DynaSig

Taxes:     All payroll taxes to be paid by DynaSig

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00095-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00095-of-00352.parquet"}]]