• 

XI 

l. !HRU:AS-80 

TOt it.S-20 AS-81 20 Jul 49 Subpaml en .S;pteu 

lb-. ••ltand lxt 389 

A. W. SMAx.t 

Aetins Chi•t• Teahn1cal ::.tatf "'IAl!!M_l.._9 Di.V. •• 

. , 

eclassifi ed and a 

- ~ ~ --- ·---'>~.!Li.~ -- l J'4 it 

roved for release b NSA on 05-23-2014 ursuantto E.O. 1352 
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- I 

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• ,.~F ID:A56882e 

Get•: f .,t~i 11;\t 

CSGAs-81 

Westem Union Telegraph Company 

60 Hudson Street 

New- York, New York 

ATrEtlrION; Mr. J. z. Villar 

Dear Sir: 

-

20 July 1949 

Inclosed is the in!omation you requested at t.he meettng on 7 July 

1949 of the UDJ.ted States Research and Development Board Subpanel en 

Systems. 

The item on the Co.munication Facilities Survey was 111cluded 'for 

your uae, as. desired, at the suggestion ot :Vr. Brady. It should be noted 

th$.t all the mtmbera ot the aubpanel, inclucling your.sell, have been approached for 1.nfonu.tion to bis 1.ncluded in the Survey am are, therefore, 

familiar with the project, even if only euperfic~ally. 

Should you tinl that the material aa preaente<i ia mt comrehens1 ve 

enough to anlWler questions which you my foresee, l will be glad to have 

reproduced and forwarded,. at yo11r reque1t, atudie• wl'licQ explain in 

greater detail the purpose and presently rlsuallzelt eempositi.on of a 

Master Encryption Transmission System. r 

2 Incle 

1. Tech estimate et 

& secure integrated 

comm eyete.m 

2. Co1111 facilitiee 

survey 

1s do • ccnlcn.'1c 1nfonna110-. al• c :ix q :he 

nc:tionaI ,,., 1.LeE> Un t~d :'.. c - "\lli1n 1'ie 

nte1,,...nu1g .... \ tl C -~'1'. ""Pt'°' - I 

793 and "8 I\s ,ran- .., • 

'of 2ts con,cnl:l m an" nc. ~ -• ,_ .....:. u_, 

pei:scm :is pr61umted b~ ~'" or1 p I 0 " 1 

., I i .,_J ...i J _,,. ....... 

l!.nce"ly yeurs, 

DAVID WOLFAND 

ASA Member Subp~l on SyatiJI!la 
• 

!J10oR 

l, One of the 1Wpomdb1Ut1u oft.ha Aftw' Seour:lt.v Aget'll:T 18 th• 

prori.111.on of oCllllLUd.cation seourity tq1.d.pment tor the D~ o1' the 

Araq. An obviou. a4juoot of t.h1s raaporud.bUJ.\7 ie ooordination with 

the 

of the 

Si&naJ. 

commu:tl.cation 

CQI1>a to auure 

qetem. 

that 

both 

there 

electrioall;r 

will b4a a 

and 

mlntnun 

operational:b', 

ot ~ 

as a 

"8Ul.t ot ths addition ot the 017Pto-equ.1pm111t to the system. 

2. In tbta prooaH ot plarnlng tor tha utntuUon ot c~pmmta, now under dwelopment,, 1n the propoeed. Anq ooanunioation system, 

it baoame apparent that the munber and t;ypu ot W1P~ J.nTOlnd oould. be nat~ 1'9Cluosl bT the pl'Wia1on ot equipment•, •8P801«1.lT on trunk o.f.touite, which ~ a "llaater lnoeyption" pri.nai- ple. The qatem 1'0Uld thin ba kD::Mn a.a a Jlute EnoJ'31J\1on ~ ... aion SJwtu or ms. 

:3. .. b ms 1nrolwa '11tl dwe.1.opman.\ of equ1pmmts 11hich wJ.11. 

be general.11' capable ota (l) .noiphei-Jng wid• bml• of all. twe• of 

intol'!D&tion ( apeeoh, faoaimU•,, carrier telegraph, Jd.ab-epeed. f'aoll1m.Ue, 

eto.) ot &n:T olauU1oation, and (2) proTiding HCUJ"lt7 agd.n-' trattio ~· by the ud.•llion of raixtam aignalm awn 11hlle no WomatJ.on ia 

aot.ualJ1' prumt, tor enoiphelment. 

b. For apeo1t1o applio&tion to the Al'nf' oomnd.catlon Qat-, the• equipment• 'WOUJ.d 'bl NqU1recl to enoi;pMr tiie outpit.a tram th• 

lllll.U-channel camer telephone ~· preaent:q being d~ by the Signal Corps. It 8hould be noted. alllO that en eqm.p.nt ot a 111m:1.-

la1" t1J>41 for eno1phermnt of • dngle Toioe-ohannal. of Worms.t.1.on 1a 

aleo umer consl.deration. 

4. Althaugb \ha nq~ for. ms baa a.1atecl tor eoi. time,1 

it was mt untril ?Wa~, •• po1ntecl M abon, tha\ th9 t1P8 ot 9ql.lipe 

ment.. which might poasibq bG provide•• TiaaaU.sed. The lat.tel"._. 

due to1 

a. The tnnd on the part. of tha Natianal Jl:llltar:r Eatabl.Uhment mi ea~ th• Department of th• Amy toward a etan:la.rd1sation. 

ot the ocawn1oat1on ayatem end 1nst.rul'Denta. 

b. Tho d.vel.0~11nt of' new techniquae 1n pulae coding ot wide 

band• of inf'ormat:lon. (tt ie felt at thia Agemy that on:Qr by a ayetem. 

using a conmon denominator for all types of Wo:naat.ion, auch aa pula• 

cod•, can a seoure:cy- enoiplwred s,ratem ba aooomplishad,J 

s. Thue icleaa were pruenttld to the Slgaal Corpe and an intol'JJl&l 

oonmtttee wu fot'IMCl whose tunotion 1a to ooord1nate, aa olos.i;, aa 
. 

. ' 

• • 

Datu 

6. One JIM\.lng of tldA oemd.tt. hu be9ll htJ.d to da.ta, at which 

t1ma it was conoluded that the primar.r probl• oonfliont.ing the OOlllld.ttee 

waa th• .t'ornlll.ation of a plan of a stud7 to determ:l.ne the co:rt ot a cairopletel.y QQUN integrated conm•n1oation .,.tea u ODDpared t.o a ei.'ld.lar 

:syut.m w1tl1 no security- proviaiona, and t.o a system pivvid.ing cornprond.H 

or inte:m.ediat. degreea of" HCNl'it7 fJ1rouah the UM of preeentq knom 

t.ahniquea. The coat of 980urit.7, aa ment.loned aboTe, will. be &i'VWl in 

taru ot charaoteristica 1'hich direotl;r atteot th• utablislJDlnt; and uaa 

of the oaauu oation qatem, au.ch 881 

•· Quantity, d.H, fti&ht, am oompl.mty ot tem:lnal and out.-

I.id• plant, equipilnt. 

b. Inatallation, operation, am aaintenano• tilDI. 

o. Peraonnal training and oleaNDO• problem. 

7. Sino• iuaut.tioiCJt intoratlon regardlng pule• code taclmiquea 

is available wJ.t..hln ASA or ~m. to toJ"llUl.ate poa1tiw ooncluaioM with 

regard to bandwidth ~·• uplltw:le, and phase distort.ion limits 

an1 th• .rteota of m1M and oroatalk, it 11as decided to preaent a proposal to t~ Bell Telephone Laboratories for a tJieoreUoal .tudJ' ot pulse 

cod• teohniquea and thdr etteot on tile deaign par8lJl8tera ot the termlnal 

and tranamiaaion f'aoW.Uea required in an integrated oomunicatian e;ratem. It an agre•*lt 1a nached with the mt., a taak will be aamigned 

UIJd.r an axi.at.l.l'lg Signal Corps Hnice oontract. It the nTL are not 

agreeable to IN.ah a taak or if' &ftilabl• fwlia are insu.t:Clcient to cover 

the reqw.Ni woric, other meal'8 ot obtainine the desired Wora.~ion will 

hen to be dtlCided. upon by the oomd.~t. ... 

a. A me•tin& with n.PN•entatin• ot the BrL will be held SO.ll 

tJ.ma later tbia month. 
_J-. 

• 

• REF ID:A56882 

-. .. • 

COlDIUIICA?IO'I PJ.CILITIBS SURVr.t' 

1. / I't beeom.ea quite obvious, when the :provision ot 

security for a CORIDlunication •1•t•c is considered, espeoiallJ 1f th.a ayatem is to remain unispaire4, that a knowlttd.1• ot 

the transm1aa1on an4 operational charactaristica of the 

system should be .k:Do11ll t~ the 1ecurity equipaent desicner 

and the syateas engineer. 

2. Since this 1ntoraat1on 1• 1oaetimea unavailable and 

at other ti:aaea :requires a &reat aaount or Uae an4 etfort to 

obtain, 1t was felt that a central sovee ot this 1ntorut1on 

would be desirable. 

3. .Accordingly th•n1 the Artq Se~urity Agency, with th• 

knowledge ot the lignal Corp•, undertook to establi•b •uch a 

eentral1sed aource. All originally planned, the final 4oouments were to oonta1n the ~nput ancl output ch.raoteristics ot 

all end instttuments and terminal equipments1 •• well aa the 

transmission charaoter1st1cs of the terminai equ1:p11.ent an4 

transll1ss1on faoil1t1ea in use o~ intenlled. ter use by all the 

military serTicea and c01111erc1al co .. \Uli.cation or1anisat1ona. 

When the magnitude ot the task was realised, it waa 4ec14ed 

to include only those 1teu ot preaent ll111tary equipment 

wh.ic..'1 were clase11"1ed l!Al?>aJ> aa to type exeept in tho•• cases 

1'here 1 t wat expected that Lil'.InD l!A.NDJ.IUl equipment would be 

in uee ~or some t111e to come. However, an attempt ia beinc 

aade to obtain as much 1ntorMtion as may be available on all 

items under development,- as well aa the policy governin& these 

developments. 

4. The cooperation ot the technical ael"Yicea within the 

Hatioual K111tary latabl1•hment and th• maJor coamero1al 

organ1aat1on1 ha• been obtain.4 and tha p.rej eot ia now about 

60 per eent coaplete4. 1'.b• tabulation or 1ntor11ation in tin.al 

.rora has yet to be aecoapl11he4. i'h• two TOlUJte•, one on 

present and one on ~uture •qu1pa1snt• al'ld tac1lit1es, are 

expected to be publilhed b)" th• end. ot 1949 • 

•