MUST REMAIN WITH ATTACHED PAPERS 

NUMBER EACH MEMO OR REPLY IN LEFT BORDER, PLACE NAME, RANK AND 

TELEPHONE NUMBER BOTTOM OF EACH ACTION DRAW LINE UNDER EACH ACTION 

ENTER FILE CLASSIFICATION ADJUTANT------

TO DA TE SUBJECT 

AS-90 AS-71 6 May 47 Applications for Patent - SN 47S,19J and SN 478,86S 

2 are forwarded for evaluation and return. 

2. The ap lioation are currently classified confidential. The question is 

whether the inv ntions m y be deolassii'ied so that patents oan issue and be 

exploi d comma oially. - - - --- --- -- ----- - -

relate to facsimile privacy apparatus. 

a. Se ial Numb r 478,193 involves the derivation of an on-off sig~l 

from a laok white m ssage (picture) and another on-off signal from a dummy 

piocure The d mess ge may or ma.y not be intelligible in itself. The two 

signals are add d by a s stem of relays so that, uhen message and dummy signals 

are al ·-e (both "ons-tt or both 11o££s 11 ), an o££ signal ift t:r;an.sm:i.tted while two 

unlike urrents result the transmission of an on signal.- - -This ia, in other 

•1ord.s, c..cord · to the o-callsd Vernam rule. At a receiving station, the dtllllll1Y 

me~sage or key s subtra ted. 

except 

Fur.the informa ion·about the subject applio~tions may 

necess from Chief, 

2 

l. 

2 

2,. T!ffiU: 

AS.;90 

TO: 

AS ... 71 

2 Inals 

n/c 

AS-SO ~\ L 

The Security Divis"ion has rio objection tO -the . ' 

deolassi:f'ication and release or these patent app"lfoa:tione 

A. SINKOV 

Chief, Security Division 

Extension 2 

WDGAS Form No 1078 PAGE-NO. _ _.l~-

26 Nov 45 38900.,....___,,_...,..,,.____,_.....,.. ___ """"'!ol..,.._._...~..,........,..:..u.,a~~-...,,..,,,,.....,,...,,......,,,..,,....,....,...--------,=-,,...-..,...,,.'=""'..,. 

eclassifi ed and a ursuant to E .0. 1352 
... ..... 

REF tn WfuFF1ce Rour1N'G 'a 

P\NO I OR CARRIER SHEET HQ ASJf' 

MUST REMAIN WITH A TT ACHED PAPERS 

NUMBER EACH MEMO OR REPLY IN LEFT BORDER PLACE NAME RANK AND 

TELEPHONE NUMBER BOTTOM OF EACH ACTION. DRAW LINE UNDER EACH ACTION 

. . ~ 

ENTER FILE CLASSIFICATION ADJUTANT ____ _ 

TO FROM DATE SUBJECT 

·. 

.. 

'-- 0 J ~ '1/. ·Th r~'si>otllf e lto:· the di-alf ~quasi;' byr' CE{) tam ' . t .Jr.. 

Woehllfu tor re-&ommen.da-tions ancf dOnnltl:en-bs ·r~i'"ng patent 

applications of William F. Friedman, aerial ntunbers . 478,193, ... 478,868, .and 551,172, numbers 47S,193 and ' ~ - . 

hrough AS-80 and AS-90. . :-• . 

J 

2. Oerta backgro d inf'ormation '7ith respect to the -tiwo cases and brief' 

descrip ions of' the inv tions thereof appear in Comment l. 

3. AS-70 oncurs w th the conclusions or AS-80 and AS-90. 

I ~ 1\ " 1 - ! 11-

'4~ Se.rial Number 5 l,172 was not circulated ai~ce the applioa~iQn ~.never been c ssified A draf' or the case was considered before filing; the'views or 

the int rested rar,i.qhe,;r d individuals may be found in an R & w, 24 July 19M., 

subjec z Authe ti_cating Device, through Chief, O Branch, to Commanding Officer._, 

Signal ecuri ty Agency, six subsequent actions, the final acM:on being an 

appro l;ly the Assistan Oht.ef', Signal Security Agency, f'or the filing of' an 

unclassified pa ant appl c.ation. 

~c 

' ' ' 

5. Retu;i-n or the c pies of the applications is request~d.'. 

.. I •• 

. 

(", ' 

'._\ 

- \I 

' ' S. KULLBACK, Chief' ~esearc~.Laboratories·Division 

Ext. 284 

,_, -- . 

) 

f,. ., I •' ~ ~· __p.f:CO'-M1N Fi::;.HI o~EJM-t~T-HtlAr-t .. - , - ...... ~ - -• , ___ _ 
I• 

TO FROM DATE SUBJECT 

3. AS- 0 AS-90 15 May 1947 Applications :tor Patent - SN 478J .. 193 and SN 478,868 (cont'd) 

Operations Division has no objectione to 

the declassirying and release or these patent applications .. 

. -...... _.._· ... 

G 

2 Inc s 

n/c ---.. H· 

FRANK "B. ROWLETT 

Chief, 0-peretions Division 

Ext. 315 .... ···- -·- _________ ........ __. ______ . ____ -·----·---·-----~~=--~~·"!"'_._,_~--===~ 

4. AS-20 AS-71 23 May 7 l. · In response to the oral request by Captain 

Woehlke for recommendations and comments regarding pa.ten 

applications of 'William F. Friedman, serial numbers 

478,193, 478,868, and 551,172, numbers 478,19:3 and 

478,868 were circulated through AS-80 and AS-90. 

2. Oerta backgro information with respect to the two cases and brief 

descrip ions of the iml'.e tions thereof appear in Comment l. 

3. Serial Number 5 1,172 was not circulated since the application had never 

been c ssified A draf of the case was considered before filing; the views ot 

the 'int rested ranches nd individuals may be found in an R & w, 24 July 1944, 

subject Authe ticating Device, through Chief, C Branch, to Commanding Of"ficer, 

Signal ecurity Agency, d six subsequent actions,, the final action being an . approva by the .Assistan Chier, Signal Security Agency, for the filing of an 

unclass ·ied pa ent appl cation. 

4. It is ecommend d that the three applications be declassified in accordanc 

with t policy estsblis·ed by a memorandum for Chief,· Army"Security Agency, from 

War Dep ment neral S arr, Military Intelligence Division, G-2, 29 April 1946, 

subject Relea e of Ory tographic Principles, as modified by a letter from Chief', 

Army Se urity ency, to AS-70, AS-80, and AS-90, lO April 1947, s~bject: 

Proced e for lease of Information Concerning Secrecy Patents. 

3 

5. Return. of the c pies of the applications is requested. 

S. KULLBAOK, Chief' 

Research Laboratories Division 

Ext. 284 

- ~ 'CONFIDENTIAL ----·"'-PAGE NO. 2 ~-· 
.• INTE~R'c~ilib~:;~;'J'fJAf AND l OR CARRIER SHEET HQ AS~ MUST REMAIN WITH A"fTACHED PAPERS 

NUMBER EACH MEMO OR. REPLY IN LEFT BORDER, PLACE NAME, RANK AND 

TELEPHONE NUMBER BOTTOM OF EACH ACTION. DR~ W LINE UNDER EACH ACTION 

ENTER FILE CLASSIFICATION ADJUTANT ------

TO FROM 

THR.U AS-24 

TO: AS-20 AS-14 

DATE SUBJECT Applications f'or Patent - SN 478_,193_, 

3 June ~7 SN 478,868_, and SN551,172 

5. ln view of the ~act that I. am an interested party as th~ 

inventor of -these paGents_, I prefer not to go on record as either 

ravoring or r.ot ravo.~ing the declassification of these patents. 

C/JJ;a.~~ WILLIAM F. FRIEDMAN 

Chier, Communications Research 

Ext 215 

AS-24 AS-20 5 June 4~ Maj. Whitehead Ext 216 

.-

3 Incle 

n/c 

WDGAS Form No. 1078 

9:6 Nov 45 38900 

Ma.te.riel Section, Staf'.f' has no objections to the 

declassification of subject patents. 

/I - .~, ~·- ·~·) ...,.,.-\ 

~~{.;j·((?~. ARTHUR V. WHITEHEAD 

Major, Signal Corps 

Chief, llateriel Section, Staf'.f' Ext~ 216 

I > £'\ ll ' l="'t' f , .... !I# '°' I - .. W ":ia. 

'-'Vil, £UL.n I 11\L 

LIFT HERE USE OTHER SIDE 

PAGE NO. _2& __ 
·11· 

f' ,.. 

. MUST REMAIN WITH ATTACHED PAPERS 

NUMBER EACH MEMO OR REPLY IN LEFT BORDER, PLACE NAME, RANK AND 

TELEPHONE NUMBER BOTTOM OF EACH ACTION. DRAW LINE l!NDER EACH ACTION 

ENTER FILE CLASSIFICATION ADJUTANT ------

TO FROM DATE SUBJECT 

AS-10 AS-23 Applications for Patent - SN 4781193 and SN 478,868 

Capt. lfoehlke/ 462 

1. Patent Applicat ons (Systems f'or Enciphering Facsimile), Serial Nos. 478, 

193 and 478,868 basicall employ the Vernam rule f'or enciphering a black and white 

picture signal 1th a . black and white picture signal. The dumJIG" picture 

signal s empl ed ill th nature of' a key. TP,e dii'f'erence between the two cases 

:J.s that Serial o. 478, 9.3 utilizes relays aDd Serial No. 478,868 employs tubes 

to peri' rm the ombining function. 

2. Patent Applicat on, Serial No. 551,172 (Authenticating Device) employs 

rotors, a rota switch ith a plugging arrangement, and a strip of' random numbers. 

A curre passi ~ t the predetermined connections . of' plugs and arrangement 

of the ors w 1 light a lamp which will give a number which may be used as an 

authent ca.tor. 

3. 

AS-70 

Patent 

since t e appli 

Agency pproved 

on 21 A !rust 19 

pplicat ons, Serial No;;. 478,193 and 478,868 were circulated by 

.AS-90 in accordance with current policy. 

pplicat n, Serial No. 551,172 was not circulated at this time 

tion wa never c1assif'ied. The Assistant Chief, Signal Security 

he appl cation for f':l1ing as an unclassified patent application 

(Inclo e 1). 

5. AS-70, S-80, a AS-90 'agree that the patent applications niay be declassi 

tied so that pat nts can ssue~ 

6. 

3 Inc1s 

f'6">o /lS ro 

WDGAS 1078 26 Nov 45 47940 

e or the attached Disposition Form. 

-~t /pAUL E. NEFF 

Lt. Ollonel, 

Acting Deput ief 

Al"ll'13' Security Agency 

Ext 498 

D/F 

PAGE NO. 3