- - ... ------ .,,. .-..------..._,;i<~- -~ -~ ~ 

REF ID:A53627 

9 Peb 1951. 

'.OOt 

ll.agelin Jlaeb:lne Con~ (CiJiher), 11-209-:S~ Fk ~"' 

Armed :rorces security .At/lfney , NATOTlle Penta&nn tf:O 3.3(h)(2) ~ -=-=- - tWaehi.neton 25, D. C. PL 86-36/50 USC 3605 .--· -==~ 

b. 1!C9P4PY!l ". i.fl!·~· :. Jmftgic). ···· .... l'o. Jll'Ov1Cle f. or the sieeda ot liii!ta iSQiii"" to Cd/ . · l: llZ"roree Groups, Ar1Q" 

J>iYi•!ona ad maJor n&Yal.ve1111e1-.• 

needs ~ ~f!l4~1¥.h't!i!~~·· TO•. povide tor the 

2. On 30 .Tam1$l7 .. · .· 1:.950. /th.ie Western SUrQl:een······ .... _ae ___ Pon (KATO) Cipher Comtttee et in l'ari•i to con.aider ~ 

tor D1'0 a&>pt1on and 40:1.nt U$e .. a second-I.trwl.. e.i»ber. fb.ia 

u.ch1ne proved to be nothtn.f *'re than av .. s. bu:l.lt, Ars:i' 81.Snal 

Corp&, llecb!ne QonTer'.ter1 X•209-D .. 

1184 ~~~ .:=~t!::: ~~?.!re equipped with ~ / ~modit1et.t1on 4eecribed 1n en,clr.ISUl'e 1 

m:ic:eypted trattie 1IOU14 be "ab•oluteJ.T secure." 

.----"-"'-'i• / ~·rep-esent$t1Te explsined that the \proposed 

I IWJdit~ to the M-~9-B vu protected b)'j =· ~patents and that it 1IOUl4 theretore b&ve to be manufactured '6jCJ fil'u or b1' toreian tirm.e ~ contract. le also atatet'l :t 

•1nce the md.81 being exhibited wu onl:r • protot;n>e 1 t voul4 

J!l."Obabl.7 take abo\lt cne .,ear before all :IA!l'O u.nits could be 

equipped with the ll)dified K-20,rB. 

SECRETi 

Declassified and approved for release by NSA on 02-12-2014 pursuantto E .0 .1352a 
REF ID:A53627 

EO 3.3(h)(2) 

PL 86-36/50 USC 3605 

SEC RE+ c~-e'i 5~ ltepx'eaentat!Tet ln!l'e :requested/tr) b• ~ed to state 

at the next acetir2at 

•· Whether tM1r nat1ons/ve:re _.epared to\ ~on a 

Joint Ar/q•XaVT•Air Foree bu:f.iJ1 the M-209-D vi th tbeL__J lkldi• 

fl.cat.ion u a •econd-level ci.pher mocldne. 

b. Whether their ns.tlona Wl"e Fe,pared to accept, on a 

Joint Ara7•ll&V)"•Air J'orce 'b .. 1s1 the K-209-J 1n 1 ts Uml0dit1ed 

tona u a th1rd·level c1»her macbine. 

c" 'fb.eil:' nat101J.IJ' . ah:lrt and ~ term m:oaer!.cal 

requ!rmenta for the aaehin°' ( :t.t accepted) bearing 1n mind that 

priority •boul.4 'be giTen to intel"naUon.el. trattie. 

6. It, aa :ta t.he/Opin.l.on ot p!!rao~1 or thi• hea4quarter1 

vb) ~~tine crtl>to •xperience, tbs u. s. JO•ition 1n regard 

to thel_ ___ Jpropoi,.al V1U :probably be Olle Of non-acceptance, 1• 

arq U. S. emm:ter,pl"OIK)asl ava11ab1~'f ~s eounterproposll.l ld.ght 

take the tom ot a 4ef1ni te U. 8. eammi ttaent to rel.eas~ • 

COJqpar&t!vel,y aeeure ayatem1 llUCll u a •trip c:l:pher with f;he strip 

elSmsnator table, er it ldcl>.t t$.lte the ton. ot a f'1ra Sta;n.1.Ung 

GroLw statement to tbe ettec·t that the matter waa under active 

corud.4era1;1on and that a •ol.uUon was eqected at some d.et1n1te 

4ate in the/?MIUIZ' future. fhe /opinion O't tbJ.IJ headquart~a \1S tbat 

th.el !proposal 1s a ret.rograda step and should be owrrl.\led. 

rue, hovover, M1' be dit.ticitlt, •!nee 't;he ll-209-ll v!th thef 

110dit:lcation 1• the onl.1' l.o'\'•leYel. clphur device 1lOV avatle."6.-l_e __ to ll'M.'O, Ind the. European n.&.tion.s JlfA:1' b<t tuelined to adopt tt tor 

laclt of' IO!letb.ing better. 

1. ll.. B- 1ntormation and guidance perta.1.Dina to the contents 

of :paragr@bs 5 and. 6 above 1• required by the u. a. representative 

on the CiJher Co:aaittee J'dor to the ne/R :meet1.'Dg on :tr :Pebruar.Y 

i9;1. 

SECftET 
REF ID:A53627 

EO 3.3(h)(2) 

PL 86-36/50 USC 3605 

SECRET 

~~ LI _ ___Jli'"""m..,.ri ..... cl'F..,.···~-~~ ......... pRS ......... ,, ..... m..., ...... JAG~W!--··/ ...... / ...... ·· • ...... __ cp_, .-!t-'/CQB_.·· i-~-F--mR-~ ..... •-·-f®::-~ 

l. ~d1t1cat!on to .theN·~. i·i.; .. convert. er conlli•ts ot a ~at!ng Disk~ Wheel us.embly 1fh1ch 11 

tnterc:hanse&ble nth the cor.reSJtlO.nnlling(l -. •emb .... ly ~li.ed Ylth 

the nanll.ar4 M-209-B. 'nle ~ con;xment ~ be l"e!IDved by 

unecrev1ng the thumbscrw in ~· center/ of /the lettiq Jnob 

e'.batt and the llK>ditied .French ••fdll.7/ inserted.. 

2. '!he 41tterence• ~ the •tanaard Indicating Disk-

!ype Wheel us~l¥ and thel lua-13" are threetol4t 

a. On the standard -eribly /the !'ype Wheel. con1d.sts ot 

lll:)ditication 

a •~dah.t ~'bet.atTanged 

the alphabet on 

ill 

the 

revertie 

!'J'pe Wheel 

01"4er. 

:l• capable~ 

On ~ 

ac::rBl(bled. acco~ to a )ll"e-atrqed. •equence because the 

!JicU.v.ta.uw.. letters ot the ~t/ lll"e quiet:cy- rm:.>vable and. 

1n:terchangee.ble. 

b. On tru, atanda,rd us•]q the Indicating Disk eonaists ot/a straight &l.pbal>Gt ~anged. in normal O%'d.er.. On the 

c::===J*>ditication 

~ 

the~ on the :tn.41cat:lng Diak is 

ot being scrambled ac¢or41ng to a JQ!'f:-ar:ranged aequonce 

becau.ae the indtTi&.lal l..ette,,..• or the al»habet are qui~ re110w.ble ad interchangeable. 

e. On th~/nr.>~tication th~e 1• 1,Q!. a4d:ttional 

418k snmted to ~~ 1 Qn4 a4Jacent to 1 the Indicatina 

:Oielt, o:o. ~ch 1s printed a aer1ea ot Uii11¥)Vable conpecut:l~ 

nuil'ber•J two series or zero tbroup nine an.done •eriea ot zero 

t'brough tour1 the 1;Paee on the num'bered. 4i8k opposite the letter 

ttz" cm the Indicating Diak 'bef.n& ten 'blank. rus ia intended 

to :perm! t direct enc:ey,ption ot m:Dlbers 1d thout spelling them out 

a1 110r4s, each lU!iber be~ ~esented by a letter 1 but v1 th 

the poss:lb1Uty Of the 1ndiv1ftual mw'bel's u.ro through tour 

be112g represented by three ditferent letters a=. the nordntDg 

l'l\Uibers ~two letter•. 

3. One teatw,-e llhich ~ be Cl7,Ptograph1ea'Jl:T undesirable 

is tbe :t'~t tha't the letters Z" on both ~ IttcUeat_!ng Diak and 

the T.f.pe Wheel are al~ fixed. 1n the seme ;poa1tion relative 

to each other U. or44r to to:rm. a cOlll'llOD. bas& i"or tho eerSD!bled 

~e Wheel and In41ee.t1ng J:)!U; al»babets eswlo)'ed. 

Inclosure l SECRET