...... 

• Di!.'PARr•:ENt Olt nu Am1Y 

?!EADCUARTERS "Rl\fY Si'..'CURI'l'Y A'.ENCY 

":o~ASHING'l'ON 260 D. Co 25 ke.y 1949 

SUBJECT: Notifiestio~ of Army Security A'-ency Technieal Committee 

Meet in~ 

f01 Chief, Operations Divi:sion 

Attn: Vr. Frank Rowlett 

l. '!'here iri.11 bs a mee-tinp.; cf the Army Security Agency Tectlnical 

Committee Qt 1015.bours. 10 June 1949,'Room 1178 Headquarter1 Buildin~, · Arlincr;ton Hall.Stationo 

2. The followin~ items will be presented for c~nsideration by the 

C011l111ittees 

Item 

-

129 

't31 

Subject 

Aircraft ~ovement 

Communic~tlon Security 

Eouipment,. ASAM 15 

Ad~ption of M/O•s for 

an Airborne Ciphony 

Sys~~y SA 'f 8 , . 

A~encies C~ncerned 

ASA 

USAF 

Si~ C 

AFF 

ASA 

USAF 

Sh: C 

AFF 

To Be 

~resented gy 

·.:.ro So Co Barlow 

Code 147 Ext 285 

Yro Co Co ~ri~ht 

Code 147 Ext 434 

...... Adortion or ~leas tor ASA Mro c. c. -~..-h:ht i 'Ml Airho,'Ae CielrieR!l )w~ USAF Code 147 Ext 434 

l -...__System ,A<;'/'. t;f Ktt;-~ Si~ C 

--~j...;J.. .aQ. ittM-~ b-...'C..) AFF 

3o The r~~owin~ item wili be presented for infornlf1tion and record: 

ltem . Subject 

"1'-32 Project title ohan~e. 

4, In the event that addit1~nal information wit~ re~ercnce to the 

above aoted 1t81!'1s is desired nrior to presentation. it is req11esteti that 

the individuals indic~terl above be c~ntacted im~ediately e~ that ~uestions 

mav be clarified prior t~ 9resantationo 
'-'!.. 

RE~ I 

•• 8E8RET5., In the event that your of'fi,,e 1s in·terested in • the items mentioned ~d a reQresentative of vour office will not be oregent, it is 

request9d th~t the Secretary. Lt. Yac Co Eversole, Code 147 Ext 216 

or 4S9, be advbed orior to the date of' the meeti.n!! of your concurrence 

in ~uch ~otion as the Con:mittee may take on these items., 

4 Jncls 

l. Subcom. Rt>t 

Item -¥Z9 

2. Su'b1>0111 Rl:Jt 

Item ¥30 

5., Subcom Rpt 

Item ,q.31 

4.. l:emo :\01· ~ecord 

Item ·'-~Z 

• 

JOffW A. l'HIDD!~S 

Lt. Colonel, Sl•nal Corps Chairman~ ASATC 
• -lDEPil'fttE\Wr 0 l' 'ME AAOOl 

llliADQUART!iFJS ARWY SEOWifi AG~CV 

~VAS:flNt;fO\\! 250 Do Co 

ll>RAFT CO?!' 

. t.Gtteir "t~ \::ar l>e~artment 0 General Stat1·!:) RGS~ll'Cb e1nd l>~elopment 

Division0 tro~ C~ief a nes~arch ~no 6n~inee~in~ Division ~©/~S-4 0 Subject& 

l\r.iU.ts.1r..- Clhsiracter1aticil fer Communic•ttion ~cwrity E.qu!~t 0 dlate& 30 

, Septsmb1Sr Jl.9~6, with !ndol'l'Hill!l3l'llt tirom r.air Oep&\u-~llflCD G@ime!i'Ell st.e.tf 0 a~ .. 

sem.1roh and :>evslopment Divisi:>n0 to Chht D Amy ._.ecuirity &11.FNill!CYo throup:h 

the Dilrsct-orr of lntelliF.<r>noeo ,. 

(l) Cormizant &t?enoy: Army Sscuri~ A~cy 

(2) Dire~tin~ afimoy: Airm:v Seouritv A~<aney 

(S) R~uestinf!:, apency: Uo s .. Air lP'orcG 

(4) Pertiei~atinr. ~~ency: ~on.G 

(5) Cocrdinatin~ a~ncyr• SJ'i.p;C 0 A1FF0 U&rur 

(6) O~her p~obable interested &F.encies: Uo So N~vy 

bo '?ull"pose1 

. ?here is &militury requirement tor a compact cryptopequipment0 

~he opeirational characteristics of' which will psrmi t e..'lcli.pherment and de... · 1-J 

ciphall"Blleiat or meesa~a, particularly aircraft moveme~ messa~ee 0 faster than~ 

squipment :now availableo 7v . 

Co Descriotionz ~ 

The A.S~ 15 will be an on-lineAs~ohronized telet:-. pe encipherment ... decipherment equ1pment11 w1 tt1 the &Qtomatic and imperoeP,tible insertion 

Of l?'l!.ndo= tex°t bet.·IJ"·".'Cr. r.i:--s-~a~ell!o 

/ 

~EGREI 
I

- RE-iE&llE:ks a 16s e 

do Related terial1 Woneo 

a. Dev~lopment History and Statuac 

Rese11srch and study has been acoompl~shed underr DA D!roje,ct Ho. ~-29°40-00la "Pr~liminary Developmeznt ct Cipher K~chine Oonponentaa® 

t. Proposed Develor:miemts 

(l) 

t~st by the USAF. 

!t is proposed to develop ten (10) eelMt'ioe test models tor 

' 

(2) The estimated total co~t ie one milli~n five hundred 

thousand dollmrs ($10 500.000.00). FY 50 ~ $3009 0000 FY 51 ° 35000 0009 

FY 52 • $7008 0000 

-, Lj)~·~~ (S) Xt is antioii.oated that dsvel~nment will be initiated . 

vvi :b Yuh· Hie and user tests O<>_mpleted i" Jaa l96Sn ~ r c-J ~ I '?' s--0 ' 

~. Secwrity Claasiti~ation1 

The equipDSnt 'lllhile ·urider development will be classified 

SEllRBTo Orypto ofearance will. be required by the oontraotor tor develop .. merit or the crypto .. componentso 

So RiOOOtJIYENDA'llONSa 

no Adop~ion or military characteristics for the ASAIV _lb as shown 

in Exhibit "A" o 

bo Establishment of Department of the Army Project ffl 29a4l..007~ 

#ci1 Ci af \ :Mou 81118 Rt CGIBIPURisa ti on Se1mF:i t!r 1!1 .. i ptl8Rt, ASAP( 150 

Co Aaah:nment of a l~priority to Project #l-29-41-007 which ie 

justitied by the c~ncep~s of par 3a. SR 706-20-lo 

do Project #1-29-410007 be classi£ied ~~~RET~ 

eo Classification of the ASAM 15 as Development Typeo 

f o The RDB ~aster plan Technical Objective of Project #l-29·il...001· 

to be I0•5o 

4o F!X~IBITSa 

~ Exhibit "A• 0 Proposed Military Characteristics tor ASAM 15~ 

2o 
5o C..iORDINATlO~: • • 

Ccordlinatbn was accomplished lri. th the followincr a l!'.encies: 

AP:enoiDe"Partmsnt of' ttae Army 

Depu-trnsn.t of. the Army 

00putmaut ot the Army 

Oapartment_o~ tl:'e Army 

l Incl 

Exhibit "Aw 

~eoreaentativ& and Title 

Lto Colo Co '!o F'letcher 

_ ortice, Chiet Sir.nal Officer 

Colonel ~dwin K. Petzin~ 

Otfice 0 Chief Sirnal Officer 

Colonel Dan& ~o McBride 

Army Field Forces» Development Section 

Lta Col~ Stuart S. Hoff 

Army J'ield Force.a, Si~al Seotion 

Major John Eo llloririaon1 J ~ . J>? 'at_of Comnn.anieationso 

~~' 

HO~.AHD O. BA.RI.Oil 

Chairman~ Cryptor,raphic 

Subcommittee, ASATC 
~816-5. 

~r~nared by C~yoto~raμhio Subcomo 

ASAYC 

BXR!Bl! "A" 

l GO GENERAL lNlFOlilllTIOM 

~o There is a military requirement for a compact crypto•equirment 0 the 

opsrantional chcaractaJr:htio's -of' which wiU ~ermit encipherrment and decipherment ol' messaP.es, ~articularly aiircraft movemen1# measar,:e& !'aster than equip .. 

mmt .no..v ava.il!iible .. · 

b. The m~ve~ent or all point=to-point aircraft tll'affic must be reported 

in a .... tim~ly and adequ&te manner to permit,communication with aircraft durinr, ~light and se!l"'l1icing upon mirrival, to make possible the pro~pt identification 

ot airn~~rt pass~ throuv,h zones and t? Jntorm he~dquarte~s c~ncerninF: flirht 

piro o:Ii'ff 8 o 

Co A similar raquiramsnt '9Xists for handlinP. other than aircraft move. 

'llll@nt-communicationao 

2o ProPosed. Service BlnplOf!a'lt 

ao Thie equipment may be utilized in all echslonso .... \ 

bo Thia equipment ~ill be utilized in mobile and fixed installationao -

Co This equipment will be utilized on-line with wire/radio teletype 

commilnication ~7stemao 

do The associated syatans shall opsrate "atartQatop"· at speeds of 

sixty (60) and one hundred (100) words .per minut&o ' 

II ... OPERATI'~NAL CHARACT~:~JSTICS 

'1o Securit:t 

&o The security shall be Grade I.o 
bo 'i.:"ime l:bmits of· • the oryptopeiriod shslll be t!flenty-·f'.nu- • (24} hoW"iJ.,.· c.-

,!o 'Ume period h which iaeou1"ity of int.~llif,ence i~ ·~·i>Sured sh!l.ll 

be un1imite~o -

do The numbiar of' statione in ~ ~rypton:et sb&ll norr!1"ta."'.!y be Ji;-:o,-o { 2) . 

It ~hnll be poHibl.e to establish multiple receivin~ s'G~t.1.llo.s whem requilrelld., 

Gr:. Thi3 memimum number of' trQXlsmissions and/ell' ·.iv-oi"C! 'l.'!"oups trensmit'ted in a Cll"YJ>tonet within a oryptopsriod shall be li.;t.:: :.<:d .to cn3 hundrr~d 

( 100) words psr minute for a ttYenty ... four ( 24) hou!" oe£"5 e '.? • AppiroJtimei:tsly 

"1h:ht hundred thousand ( 8000 000) word ~roupa:. 

2o Functi~nal requirements 

ino l'h.e enciphered sh:nal produced ixr accepted .shall be a doll naut:r&l 0 

"ste.it ... 1:rtop19

8 teletype si~al 0 twenty (20) or sixty (80) ·rr.illiarnpe!"es" 

Lins current sha~l be supplied'for only the local loopba !his equipment shm.ll be capable of transmittini:r b,v wire/radio 

telet'.vpe auto~atic on-line communications~ • 

Co The equipment 'hall operate over one (l) duplex t6letype channel~ 

-

do TYoes of data ~o be transmitted: 

(1) ?he· aquipment shall accept perrorated teletype tapec 

(2) The clear text output shall be a dep neutralp "start.,..stop~0 o. 

teletype_si~al acceptable by standard teletype receiving· equ~pment of appropriate speedo · · 

!_o The speed o~ operation shall be capable' or enclp~~!in~ or decipher= 

inP,; messag:es at a speed ot sixty (60) or one hundred (100)'" m>rd p;roups pezr 

mimnteo 

!_o Normally the ltey settinl!, she.11 be a.c;comolished once each cirypto_.. 

period and no individual meaaa~e s~ttin~ shall be required~ 

go Transmission ·of indicators is not required~ 

- So' Ran~e of Transmission/Reception 

fhe equipment ehall, not adversely affect the rane;e \lf 'the associated 

connnunication equipment" 

4o Radio Interference Heduotion 

The equipment shall comply with the provision~ of DA Memorand1.11n 1Q;, ... 2b-60 

dated 10 June 194£!, 11 pd DA Memorandum l05-25co8" dated 1 Decen:.ber l94Bo 
• REF Sf&Rila16s 

&o Spurious R&dhti:>n of Clear Text 

~rs sbm.U "t?e m paFCe'Ptable radiation of the cleair tot siP"nale 

~. ~r Raquiriamsnt 

~a equipment !Sh!aU opeirate from U.0/250 (~l~) ~o:ll.ts9 50/60 (,il!.0}0 

cycle ID.C 9cwair SOW'CGlo · 

'lo !qtuip!'Snt Op:iratln~ Pcd.tion Raquirements 

The equ:B.pmalilt shall opsrate when tU.ted un to ti;Jenty0 five (25°) der:rees 

from ! t.11 normml position, 

lo Weieht ~nd volume raotore 

~ desired weiP.ht shall be l~ss th.~n one hundred (ll.00) poundso The . maximum a.ccer~ble wei!rh.t shall be two hundred (200) pounds.,, 

2o O~~etion, T~ansportat.ion 1 Packa~in~ 0 9nd Stcraee requirements 

ao This equipmnt shall withstand vibiration and shook encountered 1111 

tixsd station and Dl!Obile installationso 

bo This equipment shali be cepable ct operating: in the .follcm~ 

ambient condi tiona: 

(l) Tsrrr~ratuires from ,l20°F to ,l12s°F and atora~e:iat ... aoOJ' 

to /ASOCFo · . 

(2) Hunidity from 0 to 95~o 

Co !bis equ1p~t shmll be capable of air transportability in 

Phase IIo (!GAO·S 452ol Ltr dtd 15 Sep 47. CSORD/DDH)o 

3. Dastructi~n Requir81Jl8~ta 

The equipment shall be provided with a sim'Dle .enierP.ency destruction 

meenso ' 

l,o Operati rl!" Tims 

Hr 

Tt\e equipment shall be capable of cantinuous twen~-tour (24)/\operati on 

e:ce~t for the time required to perform normal preventative mainten!!Deeo 

,. 

SEBREJ 
PofmiSSi ble S-::ane of Contin~Jous· and Periodic Ad ustments 0 Tuninll'. 

aintenanoe, ·stco 

~is raquiipmant shall riaq·Jire not moll's them. a ~ili'tf (30) minut~ 

p~~iod·~aily tor praventa~ive mainten&noe and c~~~ti~n~l ac!j\ll&Uiant 

(midi includes kay &Gttin1d o 

Thill ~uipiient shall be capable or bein~ prepeired flfcm a. storaF.e condition 

to n poweir off ocndli tion in e. p@riod of one (JI.) how-. 

~o Yam'Lmum. Accee~altlra Prspmriitio111 PerJads from Sswll"ed cir fowsr O~t Oouditions 

~o The aquipmen:t shall .require a Jrm:imum or ti?ta (5Ei hows to prepua 

fli'Om._a oowr off to a standby c:mdition (heatei"s cn 0 fil11;unen~s li:rh.ted, eto .. ) 

!• 'l'he e:.1uipnient shall require a maximum of' t.'lllrty lSO) minutes to 

prepare from~ stendby t~ a fully ope?atin~ conditionq . . 

SEGRE! 

, 
-0 

SIIJBOOlY.lUftU RiPCB1 Y.OR AIW.Y SECURITY AGSf~CV ?ieff:;!eA& OOlb'~I~ . 

~\» .. 

SUBJEC'fa' Adoption off »U.lituy Gharactei"ist1cs fell'~ System 

ao Lette~ to ~ar Department Ceneral Statf 0 Research and Develop• 

ment Divisi~n0 from Ohief, Research &nd !=;n~ineerin~ &ivision AC/iSc.43 

subject: Military Ch&racteristics tor Communication Security Equipment, 

d&ted SO Se~temtbei' 1~5 0 with indorsernent t"lro~ ~&LJr ~epgrtment General 

Sta.tr, Research and Development Divisi~n to Chisf0 Army Securi~1 A~ency 

throu~h the Director of lntelli~ence~ · 

bo aevised Uo So Air Force ~ilitary Ch!U'aoteristics for Airborne 

Ciphcny System r eeultinir. fll'Om oonrerences held at Army Securi1;y-A1Pency on 

1-4 November 1946 and 21 November 1946 with nn>tresentatives of the U. ~. 

Air Foroe., . 

2o DI SCUSSJQW1 

So A~noiee C~ncerned: 

(1) , (2) 

(3) 

(4) 

(5) 

(6) 

Cc~nizant A~ency: Army 8ecurity A~ency 

Directin~ A~enoya Army Security A~ency 

P.eqi.iestinv. At,encys USAF Participatin~ A~enciesa None Coor~ina"tinP; Agencies a USAF 0 AFF 0 Sh: C, 

Other Probable Interested A~encie9: Wavy 

. The Uo So Air Force has a military requirement for voice 

security equipment for use in low echelon a1r-to-air 0 and air-to-~round 

communioations providin~ security to include the minimum clas~ification 

of COllFIDENTJAL and Miich is desi~ned for use with aircraft cormnunicaa 

tiona equipments and their complimentary r,round equipmentso 

Co Descriptions 

These llilitary Charactoristics c'.>ver the requirements f'or 

SES.REF 
9 REF~165 .e 

voice aecwrity ~q~i-pment llla?iu~ G~ade nr security tor us~ in low echelons. 

'ibe eqU:l.pllllSDfG irs intended fcir use lll!ith standard VJW Oll'l' il!W lill1e...Of'..,fdght 

Oli!i'orr:.rt riad~o ~uipme!llts araci mu be installed in. my iatiande.rd ailrcratt. 

~. 'sl~t~d Ka~rials 

e. Development liiato~Y. and Status: 

.Prcjact lo. ll.-!9-20...00J.,WQs approved 20 fe'blr'uiry ll.!Hi'f. J>Qsieiin 

ot ~ &irbome Gi:phcuy SJY&t&m is wmder~y. 

t. P~oioo~ed Dew-~lCp!!!te 

A llshcratory model\. will be C'>DSbJl'Uct&d 11.t Army Securrity . 

Ar,wc:v md six ( 6) service Ci(?Hlil: mode le wi 11 be constE>uoted urmdeir coutraot 

tor teat by the u. s. Aili" FOi'ceD 

~· Security Clasaificationa 

The OlQSBif'io&tion ct the Military Characteri•tics is SECRE'l'o 

3o R~Oi1lliRklDATJONSa 

The Subcommi.ttee recomm.andas 

The adc»~tion ot ~ilitary Characteristics tor &na Airborn~ Ciphofllll' 

Syete ai.s 11hctm in Exhibit 00.&..11 ., 

4o BX'lfIBI'l'Ss . 

a 0 hh'i'bit '°AH• proposed 'llAiUtary Charaoteristtos tor u Air· 

'bor:r.11 Ciphony System. dated .1:5 May 1949-o 

So COORDINA!IOM1 

Coordination was accomplished with the following &~enciee: 

Agency . · 

Deoartmant ot the Army 

I 

Department of the·Air Force 

Representative and Title 

Colonel 7~ Jo Klepin~r 

Army Field Forces 

Major John E. lforrisou ~ · 

Direotorate er Comnn.miclt"ions 
A REF ~~8165· A 

- O&Um181 -

Representative and ?itle 

Dapartment or the Army I 

Colonel ~o R. Petaine; 

l lnol 

Exhibit ••00 

/. 

. ' 

Lto Colonel Go Eo Fletche~ 

Office or the Chief Sir:n~l OfficSJr 

CLAR~CE c. ~IOBT 

Chairman,, Ciphony, Cit'ax and 

Civieion Suboo~ittee 
REF ~RR.58165 '\Z7CS'9' •~'-- '-6 

Prepared by CCC Subcommittee 

Date 13 N&l 1949 

Approvea b~ ..,.A_s_A_r_c _____ _ 

Date 

llJt.lTAHT Cll4•ACT1'11I!l'l'lC.s ror Airborne C:lp'1ony ~<;,Ao '1. g 

5ubm1tted by USAF Date · _......., ........................ __ ... 

1 • GENERAL lijJFORMATION 

lo <!>.Jective . • , CV-~ 

ao The u .. ~. Air Force hls.s a military requiremem:t. tor voice se.eFecy ' 

equipment for use in low echelon air•too&ir~ and air-to-ground oo:mmuniceo 

tiona _providin~ security to j nolude the minilmWll classitioati,on ot OONFIDENT!A.L 

and which is desi~ned tor use with aircra.t't communicati :'>n& equipmeints and 

th~ir oomplimentary v.round equipments. 

a. 1\ill be used in 1011t echelons. 

b. )'till be uaed ~,?-:;:~, &i!C'·to-air,. ana &.ir-to•:::roundo 

c. Shall be oapahle or being;. installed jn standard f'i.a:hter. bomber or 

transport aircrafto 

d. itill' be ~se~ with com~limentarv Air Force ~round equipmentso 

Jr • OPE:RA 'l'TrmAL CHA G"ACT!!:R ISTI cs 

lo SeC1Arity 

Thia equipment ahalls 

,a. dave Orade IV securityo 

bo Provide c:rypto-seouri ty for st least two weeks. 

o. Provide tor multi-station net operation. 

· -8EGREi. 
REF I 

d. Be so c:1nstructed that the sea•Jrity of· subaequen: transn.issions 

will not be endan~ered by the enemy's' possession of ~~e l!'ener&l mechanismp 

~r,vided ne ia not.in possession of the sp~oifio key. 

e. · Be caoable of l\andlintr hi!"h l:v ster?t~v'!)ed air ... to ... air and air•top:round weather messa~eso 

2. Functional Fequirementa 

This e~uipnent shall1 

ao Accept clear, conversational speech and reproduce speeGh or speechD 

equivalent undistoBtpd and readily intelli~iblea 

b. Be opert!.ble J•rom a .standard ir.icrophoneo 

Co Be desii.med primarily for use. wi'th standard VHF or UHF' lineoof'-siir.ht 

aircraft radio e<;uipmen.t and he readily adaptable to e ompl!ment~ ~ound 

'aetaa ' 

, I 

do Be provided a key v·"rhble wit'hou.t the use of 11. tool~ 

3o. Han!!.e of' Transmission/Reception 

a. Thia equipment shall not causo s loss ir. transmission ran~e in the 

circuit in which it is bein~ usedo 

4. ~adio Interference Reduction 

ao l'his el},ui pmen~ shall orovide a si~al not unduly af'fected by inter ... 

ference and atmospherics and which shall not inter~ere Niti't the operation 

or other commnnicationa equipmento 

s·o Stability 

ao Tnis e~ipment shall not require c~nstant control or synchronizationo 

61) Power Requirement 

Bo ~his equipment shall be operable from power sources of 115/230 Vdlts 

50/60 cps ACJ 115 volt 400 cps ACa and 24 to 28 volt DO; by means of separable 

power suppliesa · 

7. Special Features 

a. · This equipment shall introduce no perceptible la!:"' betwf'en the tima 

of transmtssion and the time of receptiono Q 

Ill • P!JYSICAL CHARACTERISTICS 

lo Wei~ht and Volume Factors 

a. This equipment shall not wei?h tr.ore than 15 pounds. CJltClusive of' 

power eupplyo 
REF ID:A58165 

SEGHET 

2. Operation, Transparte.·~~ in. 'Paoka11;in9', and Stora,,.e Requ1remente 

a. 'l'his eq•JiDeant. shall be eo o~natruoted as to be ~able or operation 

and •tor•~ under oli.Dl•tic otndition• as a-peoified in A<J:l letter, tile AGA0-

8'00eZ4 (12 April 1946) CSllSP .... subjeot1 l'aapesra.ture llequirement1 tor the 

Performance 8Z1d Stora,:• or !..'. S. Army Squi-paient and Suppli••• dated 15 April 

19460 

~. Deatruotion JieSu1r ementa 

•• ~his equip19nt shall be provided• ei.llple ... rr,.aoy deatruotion 

...... 
,..------------

De!?.!}.ll!W!ENT OF l'HE AWAY 

§U!'!All>QUARTBlRS ~T'1lf'f Si!!Clml!f AOBfl!O'f 

~'.:aSillW~TO Q1 25 0 1Do ~. 

stmJICi'1 Adlcptiiora of' ~il!.i'tery Cb.inr11.cteirie~ioe toir a t1QC'liwa His:;h Bobsll.on 

C iphof!Y S1m tan 

a.o Latter to Wu Department Genell'al Std"t0 hae~rrch. tt&nd Onelopco 

meat Div1s10il0 fircm Cb.wt 0 Reeearc."l. and ht,ineerin~ Division AC/A.So48 

11U1bject1 ~!litairy Characte~istics for Conmunicati~~ Security Equipmenta 

dated.30 Septeiillber 19489 with indorsement from.\\'ar Oep&rtment General 

Staff 0 R;iaem:_ch eel Development Division to . Chief 0 Army Security A!"enoy throu~ the Dilrectc~ ot lntelli~enceo 

be Revised U'o So Ailr !o'orce i1iJl.it.uy Chairacteriat:ice tor Medium 

Hiirh Eohelon Ciphony Syetem 1resultiner. t'!i"om confusnces lnell.d at Army 

Seoui1ri ty lui:enoy on 14 llcwsmber 194 A and 21 November 1946 with r epressnta• 

tivss of the Uo s. Air Fo~ceo 

2o DISCUSSIO'th 

(l) Cornizant A~ncya Army Securi~ A~ency 

(2) DireotinP. A rency: Army Secuirity A11:ency 

(S) Requeet1ni: Av.ency: USAF 

(4)· P~tici~&tin~ Agenoiesi Ions 

(5) Coordin&tin~ A~encies: USAF0 AFF9 Si~ C 

(6) Other Probable lnterested Agencies: Wavy 

b o Plrpos 4': 

1'ha u. So Air Force has a military requirement for· voice 

aecuri ty eq1.d.pment for command and oon.ference purposes amonv hi!',h and 

medium echelons~ Thie equipment shall be desi~ned to attord security 

from <an.81J1Y 11nalysis t~ voice communioati~ns· of all classitioations 

trllD&llilitted over radio &nd wire tactlitieso 

o. Description: 

These W.ilitary Charactoristics cover the re~uirements for 
~' REF-~8165 e 

WOi@G seourity equipment h~Vin!r Grade U HCurity for USS in hi~h and 

llii'l~dlim scllllelc>na cvcar lll01rmtAl lcn!? rui~e wire and radio voice oircuit1So 

(1) 

(!) typ~ equipmento 

SlGSALY ghioh is classified me wa~tima reserve equipQ 

Unto · 

~ ' 

ASAY 2D S 'C1hich ~oleseitied aie substitute atande.rd 

e. D~velcJ!!nt History and Status: 

,Plrojeot No. 1~29-22.003 was established 2l April 19410 A 

J\.sboratory mod~l ot a medium hi'-h echelon ciphor:y eyste:n bms been con ... 

stlructed mnd is ou~rantly under~oin~ field testsa 

t. 'Plr~posed Develaenants 

.. 

Thr~e (3) service test J11.odsla will be co.nstiruoted under con ... 

tiract to~ test by usi12g a~enoiea. 

~· Security Classifications 

'l'hs classification or the Militar.r Characterlstios is SEOnETo 

Sa REC.:illdr.HIDAT!ONSa 

l'he Subcol'llJllittoe recommends: 

The adoption of W.ilitery Ch&racteristics tor Q Hedium Hi~h 

Eohslon Oiphon.v System as shown in Exhibit ·"A" o 

<io EXRIBI1'St 

ao Exhtbit "A~. proposed Military Oh~racteristica tor a Mediwn ffi~h Echelon Oiphony Syetem, dated 15 H&\V 19490 

5o COORD1NATlOW: 

Coordination haR been a ccomplishcd with the rollowin'!: a,.enc.i esc 

Depart.meat of the Air Force 

::>epar tment or the Amy 

kepr&sentative a~d Title 

~ajor John ~a ·ftiorrison 

Uirectorate of ~ommunications 

Colonel :~. J. Kepin!!'.er 

Army Field Forces 
• AHn~ 

Dep.artmen t or tho Army 

l Incl 

g,m1bit "A" 

REF S.f&&a16S 

· .. Representative and-Title 

Colonel K. Ro Petzing 

Lt. Colonel Go H~ ft'letcher 

Office or the Chief Si"'!lal Ottioer 

SEflE I • 

CLAitENCE C. -;.'IRitJHT 

Chairman, Ciphony. Cifax and 

Civision Subcommittee 
• REF !mfSJl165 

. ........ --

Prepared'by ccd su5connnlttee 

l~ lay 1949 

Ksl'rc D~te Approved by Date __ .._..._ ..... ----.... .-..-

MILITARY CffAFACT!!;fllSTICS tor V.edium tliv.h Echelon Oioho 

Submitted by USAF 

Date --------------~-

. 11(" 

lo Oh,j!ctht> 

~ 

~ 

ao The Uo So Air Force has a military requirement tor ~oiee e..ectit.Jy 

equipment tor comma:..1~ at:id c~nference purposes amone; hiF:h and medium echelonso 

ThiR equipment shall be desi~ned to afford seou~ity fro~ enemy :~nalysia to 

voice coll'munications of all classi.f'ic.atbns transmitted over radio and 

wire f'aoi litie So 

2·0 Proposed Service ~ploym.en t 

This e~·.li prr.ent: 

a. Yiill be used in medinrn and hi. O'li. echelonso 

h. ~."i 11 ~e used in fixed and se'!!'.i .. fixed installations o 

Co Shal 1 be oper,able with correapondin!'" communications equioment oi' the 

Depa~tment of the ~Yo 

II .t OPERATIONAL CHAHACTEF.I~TlOS 

l.o Secur i tx e 

This equipment shall: 

&o Have Grade II securityo 

bo Provide crypto-security for at least five yearac:• 

I 

Co Provide for at least four station conrer~nce o~erati~n per cryptonet~ 

do Be s~ constructed that the security of subsequent transmissions will 

not be endan~ered by the enemy's pos~essi n of the ~eneral mechanism, provided 

he is not in possession of the specific keyo. 

2. Functi,:mal ttequ irme nts 

T!lis equipments hall: · 
• REF smaSsa16S 

Q. Accept oleQr, on~versati~nal aoaeoh and reproduce speech or 

apeeohoequivalent undistorted and readily intell1P.ibleo 

bo Je operable from & Standard telephone nandset it G!>!\Sistent 1i1!th 

other oharacterisitcso 

c. Be oaoable of transmittinv over normal lon~ ran~e voice circuits 

(wire~ carrier, and/or radio) which accommqdate am~litude modulated ai~ala 

ot a nomif!al 300 ops to 3300 cps. b~~o 

do Se provided a key varh.ble without the' 11se· of' a toolo 

•o ProTide tor' six subscriber operation ~ft' .. one terninalo 

t. 6mit a clear, str-ident warnin~ to both RUbsor1ber and attendent 

when .transreisaion in.the clear is 000.uri~~o 

t 

So Ranre of Trane~tssio~f!eceotio~ 

a. This equipment shall not o~se a loss in transmissiQn ran~e in 'flhe 

C?irc1.ait in· w"lich it is beinir. usedo 

•o Radio Interference Reduction 

. a. This equipment shall provide a si•nal not unduly arrecte9 by inier• 

rer·~· and atmospherics and which shall not interfere with the operat'ion 

ot other communications equipment.; .. 

&. Power Requirement 

' 

&o this equipment shal I be operable from. a ll!>/230 volt.~. 50/60 cyole 

power source and be ~rovided with a standard power plant_ capable or continuous operationo 

III. • PHYSICAL CfIAP.AC'!'!PlSTtCS 

1., '."!ei r.ht and Volume f'actora 

&o Tltis equipmen.t shall be s ep·arable into components ro:-aoh not to exceed 

a two man load a 

. ' - 2. Operati3n. Transportation. Peckav.in~, nnd Stora~~ Resuirementa 

This eq~imnent shall1 

a. 9e lirht, sturdy, oomoaot and of ~~e simplest oosaible desi~n 

consistent with o~her requirein.entso 

- b;.. Be so constructed as to be capable of operation and stora~e under 

climatic :conditions &R specified in AGO letter, File A.GAO•S400o24 (l.2 April 

1948) 08'\SP-V, subjects Temperature ffe'lui:rements tor the Performance and 

Stora'e of Uo S. Army Bquipment and Su~~lies, dated 15 April 19480 
,REF saJREf8165 e 

Co Ba housed in a submersion°p~~or car~yin~ case or cases whichare ct S'Vlf~iciantly ru,eed and we~the~proor o~nstruotion to withstBllld normal usa~Q 

in the l?i~'id. · 

do Be tranepqrtable ia Qny st~ndard oar~~ airc~aft ~ad be cap~ble ot 

utilization in Phase !lot air oper~tionso 

3. Destruction Raquirementa 

a.. This equipment a.Jial l be provided subsidia.rv means ror oo.mnlets destruction or the speciric key and such other component o arts as are necessary to 

securityo . -

, 

·IV ... t:~UIPMENT OPERATION AND l'A TWTENANCE OlJARA~TERI STICS 

lo Special Features 

ao This equipment shall be.capable of bein~ insta~led by two meno 

I 

&EGREF 
' 

JT'IW WO. 3%. 

A REF ID:A58165.· A 

'W' I>E·'ARl'Mi!lN~ o~· lll!S Al&Y W 

liEADQUAHT3RS·Aai.'Y SECURITY AGENCY 

WASMlfiO'fOW 25,.D. Co 

!llMOPA'IDt'.'M JiOF ttn: R'imRD or '!'ff! ARf.Y S!CIJRTTY A')~CY TEC1UCAL CO~UI'J."fD ' I 

stJ~JRCT1 Project Title Ohan~e 

D!<AF? Cv1'Y 

IRS to ASATC thru AS-70 and ASa20 with S oornmenta, Subject: · Chan~ea in 

Project Titles, d~ted 27 April 19490 · 

2. lbe tollowi~ project title ohan~es were a·~roved by above referenced IRS 

and are herebv made e .. matter of record: 

a,, DA Project #1-29·52-00lo 

Old Title: Hi Frequency Multioounlers and Antennas. 

New Title: ~ultioouplerso 

The old title is ~ascriptive or only·one phase of this projectp 

bo DA Project #1·29-S2D004. 

Old Title: Interim Precision Recorder, ASAW llo 

New Title& Precision Disc Recorder Reproducer, ASA~ 11. 

The old project title is not descriptive. 

MAC C. EVERSOLE 

1st Lt •• Sional Co~p• 

Secretary. ASATC 

,• 

' 

' I