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Thru: 

Director of 

Communications 

Research 

To: 

Commanding 

Officer, 

SSA 

'" -11012 e ...... ..,;;,,;,,,;.-.... 

RE Ir- .,..,j • 

Teletypewriter Adapter to AN/GS~-2,3 

1. Development Branch desires to 

undertake a research project to determine 

the means by which stan~ard teletype- writer signals may be encrypted and decrypted by Speech Equipment .AN/GSQ-2,3. 

2. Present knowledge of the AN/GS~-2,3 equipment indicates that it 

would be possible to simultaneously 

encrypt and decrypt three channels ot 

teletypewriters with a very high degree 

or security. 

3. If the results 0£ this project 

prove that the use of a teletype adapter is practical, Development Branch proposes 

to obtain the military characteristics 

and approval by the service• to undertake a development project. 

4. The P1sca.l and Certity1r.ag Officer has stated that funda are 

available for this project. 

5• Approval of the 1nclosed pro- ject sheet is recanmended and requested. 

Incl. Leo Rosen 

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Project Sheet 2011 Lt Col, SPSIP 

22 December 1944 

Bxt 284 

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REF ID:A71012 ~ 

~~~~GECRE]~~~~ 

'l'eletnevr1ter Adapter to Al'f/OSQ-2,, (Cont'd) 

1. !his 1s intended to t~e purelf 

a research project to aacertaizl the s1g- na1-communicat1on carr7ing posa1b111t1ea or the AN/GSQ•2•' above and be7ond its 

ciphoDJ poss1b1l!t1es. The idea is that 

this piece ot expensive equipment should 

be utilized to nax!mum extent &Dd hence, during the hours vhen there 1a no need 

tor c1phODJ' usage. the eqUipment might be empl07ed tor other tJPea ot signal commun1cat1on purposes. 

2. One ot the t7pe1 which might be used to good advantage as a •tiller- , 1n• is the tran1m1s111on and enciphel'lllent 

ot teletJPCtvriter signals. Although, as 

stated 1Jl paragraph 2 ot action l, it 

appears pop1ble to do vbat is indicated .. therein, "'!here are a number ot technical 

· problems vhich must be solved 1n order 

to dete1'Dlin• the pract1cab111t7 of the 

proposed scheme. QueatioDS ot circuit 

design, w1-tfnrer the s7stem should be or 

the start-atop tJPe of multiplex t7pe, etc., must be answered. 

'. In view of the tact th& t the 

vhdts tield ot c1phoDJ is becom1ng one 

ot fhcreasing importance, investigation 

ot add1t1cmal possibilities or usefulness 

ot eqUipment b&sicall7 designed for 

c1pho.D7 pul'l)Qses, seems a truittul and 

uaetul field tor research. 

4. There 1a, ot course, no vgenc7 about this project and all tbat P Branch 

proposes at tbis time ia to get this 

'approved aa a project so tbat ruture plazm ' tor work load and materiel procurement can 

'. be :i»repared. 

5. Although I know 1ou feel that . 'p BraDcb nov has a considerable number of , projects under va7, as JOU noted 1n the 

' report tor Novemb•:r 1944, a tair numbel' " 1 1r \ ·-GECRE] . 
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REF ID:A71012 ~ 

BECRElJ 

bave been completed and v111 be ahown as 

such 1D the December report. In the case 

ot certain others, there 1a no more research 

or development work tor P Branch to do on 

them, closing ot the project depending upon action b7 outa1de agencies, as tor exampl.11'. th~ clearing up ot patent rights, which can 

onl7 be done vhen the contractor files h1s 

papers. In m&nJ' cases the contractor 1s 

wa7 behind in this vork and we can do 11t&le 

to changing that situation. 'l'heretore, I 

do not th1nk F Branch is undertaking more 

than it can and should handle. 

6. Por toregoing reaaou, approval 

ot this project is recommended. 

l Incl1 n/c 

Wm. P. Pr1e4-n, Dir ot Oom Rea., 28 Dec 44, 

Bxt. 215.