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REF ID:A71111 

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Cel .. 1 llep1Dpr - Aftl6 Piel&I Paraea 

Mr. Inna 

2 In 1948 

llil1t&17 CharacteriaUaa tor Cl'JptoP"&Pbio lqdpillllt. 

tor st;att c-·nicatiana 

Cal.mud Kleplnger had received a cow et a let.t.er addrea•.t. ta t.he 

D!zoeato:r ot Intelllpnce,, cCMCeriiJla these MilU.a17 Cbaracteriet.ias Aft7 

ft•ld Fon•• llieh to mdit7 the• J:illta17 Charr.at..rlatJ.c• t.o a oandcllnbi. 

ment. '1'ne7 cl1d not concur or noncanoar becauae et their aaept.ione 

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... .J ti .., -t lo .. ..) ...... , )" ... \ .. .... .. 

~pproved tS~'RS~le~se b; NSA ;n o?-2]_·~rj14 p~rsuant to E.O. 1352A_ .. _ 
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(3) 

(4) 

(5) 

(6) 

(7) 

(8) 

(9) 

.., ... _ REF ID :A71111 

Compo: .. e List ot Various IW.itarz Cha.. terietice 

tor Criptologic Devices 

llanitold trananiasion channels to accC11110clate s:lnml.taneous tacllimile, 

YOice, and auto-kqecl aignala 

Prori.de a continuoual7 enciphered signal 

Possess a specitied degree ot securit;r 

Clwiate need tor paraphrasing and aterotJPing 

Obviate need tor message indicator s::rat•s and bu1"1inl ot acldreaa and. 

signatures 

PrOYide automatic 8JDChroniam between stations regardless or transmission 

m.eans 

In the torm. ot fixed plant terminal equipment 

Will not reduce the etticienc7 ot &IJ1' trananisaion s7st• with which used 

Require no special handling or preparation ot text to be tranamitted 

(10) a Speed consistent with transm.isaion m.eans with which mplQ18d 

b Higher speed than previous devices tor same purpose 

c Operating speed ot WPll 

(1) Automatic (2) Semi-automatic (3) Kanual 

(ll) Operate trom. 

a 115/230 v 50/60 c;ra 

b ll5T DC 

c 24T DC 

d standard aircraft power 

e batte17 

AC 

I (12) Handle m.eaaagea ot all claaait:lcationa 

.3 (13) Complete change ot ke::r and check within ___ minutes 

(14) Provide page cow 

(15) Provide printed tape cow 

(l.6) Capable ot operating on-line and ott-line 

3 (17) Proride direct enc~ion ot num.erals 

(18) ~ 1n construction and operation, thereb7 requiring minimum. ot training 

(19) Operate with 

a llcmaal teletnewriter equip1Lent 

b uptweicht field telet7P8"riter 

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f.. T 

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• REF ID:A71111 

(20) Ccmmmicable with 

a F.quiT&lent gromd force equipnent 

b n air force equipnent 

c 

(21) Operable over 

a Standard t1J)8a ot wire and rad.i'b aignal communication equipment 

b Aircraft liaison radio qst .. 

(22) Jleangea can be automatical.17 deciphered upon receipt, with plain tut 

being printed at both tranamitting and receiYing terminal.a 

(23) Simple indicator qat• tor use with each message 

( 24) Ke,board operated 

(25) Capture b7 en911T will not adveraeJ.7 affect aubaequent tranllllisaions 

(26) Constant change of indicators not required 

(27) Manual operations held to .minimum 

(28) Suitable tor tancl• operation to turniab "break-back" check copy 

(29) Capable ot continuous operation over ext.ended periods 

(30) In case ot equipnent. fa1.lure, tranlllllisllion '11&7 be continued b7 CW 

(31) Accept clear speech and reproduce same undistorted 

(32) Signal not undul.7 affected b7 interference and ataoapher:l.cs 

( 33) Key variable produced 111 thout use of tool 

( 34) Give clear waming when tranamitting in the clear 

(35) Means provided tqr destruction ot specitic ke7 and ccnponent parts 

(36) Operate with standard trana radio sets and wire telephone equipmed; having 

trans band width ot 3000 c;vclea per aea.ond without modification or either 

(37) Provide tor ml.ti-net operation }'~ 

(38) Jlulti-aubacriber ope:at.ion ott one terminal 

(39) Ro losa in tranlllllisaion range in the circuit being used 

(40) Hot require close control of ambient t-.perature 

(41) Can be inatalled and operated in I.JV' shelter suitable tor other comparable 

caaaurd.cationa equipment 

(42) lot require more skill to maintain and operate than standard radio equipment 
• REF ID :A71111 • 

(4.3) Integral part ot aircratt command radio equipnent 

(44) Operate troll etand.ard microphone 

(45) lot require constant control ot s711chronization 

(46) Usable tor point-to-point low echelon voice traffic 

(47) lo lag between time of reception and time ot transmission 

(48) Tranmniaaion of a pictorial picture which requirea no longer than 

tranamiaaion in the clear 

(49) Will produce black and white or halftone COPJ' 

(50) Use ot photographic negatives aa recei:ving element aa well aa graphitebacked paper 

(Sl) Will handle picture ot specified size 

(52) Provide tor multiple reception at atationa capable of phrasing with 

the transmitting equipnmt 

(53) Exact reproduction ot original material 

( 54) Cl")'ptographic element a1mpl.e enmgh to be handled 'bJ' code-roan personnel 

(55) Tranmit ewer normal voice circuits in liaison sat 

( 56) Operate aa ancilla17 equipaent