< 

AFSACa 63hl 

BPJ: • ~AX Pmllim!! 

!1!q·P.WWt.fOR nm.J:lm'f.S. Ql.P'.§1&: 

I 023 

6 Juq 1953 

Subject.1 Beleaae ot the ASw..4 (Smtl:m) ei,,ptoprinc1ples to 

the U.K., Canadat Australia, and Uew Zoal.and 

l. Inclosure l is .f'orward.od. with a vote sheet tor the concur1-ence 

. 

'-1"'1'\~ C' • h irL..... 

Incloauree - 2 

?Wit c. FISHER 

LT.JG• USU 

Seczetar,y, AlSAC 

l. Dl'at't rtamrandum by the Director, NSA tort.he Joint Ohiets 

of Stett, subject &Cl above. . 

2. Vote sheet dated 6 Jul.1' l9S3• / ,7..t.Al.4 ~~ · ~ ) 

.AF'SAC I 63/71 

Declassified and approved for release by NSA on 06-11-2014 pursuant to E .0. 1352a 

SECRET 
... 

MFM>RANDUM BY THE DIROOTOR, NATIONAL sroURITI .~mcy 

tor the 

Jt>IN'l' CBII:FS OF STAFF 023 

on 

1. The A.rnJ¥ SecU1"1ty Agtaoncy baa requested tlat consideration be given 

to the use o-r the ASAM.Ji. f'or on~Une operation in ext!'lBnging certain COMlliT 

in:tozmtion be~"een Amy a!Ml Br1thll inte"'°ept ota.tiona in Europe.. Th~· 

ASAM-1~ alters c~rta.in oecuri ty adwntages in these commun1oat:Loiw which are 

not nm: obtainable with atmlde.rd teletypewriter equiplilent and associated 

enc1•yption eq_uipnent. In rclea.e:lng the ASAM-4 for Combined. use, acidit:loml 

teletypcwl."1 ter e:ncryption. equ1pmenta 00".I' neC!ded "111 bacmne available • 

2. 'l'h:? ASAM-!f (SIGNIN), a aiphe1• mch11'1tl for encryption or teletype• 

'W".t'i":°.er sisnaJ.s, vu produced :lu limited qU811tities in 1¢5. By the cl.ooe or 

UOZ"ld war II, serv1ct- teato or.i.ly t.ad been mde on the quipoont. The 

equi:pt!k!nt ns :recently re-introduced 'for 11m1te<l Join1. use 1n tho hr Fa.at 

tor CP.rte.1n sped.al1zecl coi:nunications. 

3. Before further cons:l4'.e:ration aa.n be given to enwloymmnt of the I.SAM-It· 

~or the :purJ,lOse stated a'batle1 it '11111 be nace1umey- to d:lsc1oae the cr,yptoprir.cS.ples to Britiah communic!t.t!C'ns sec'Ul"ity el:perts in cmlP.r that thE:y can 

mkc e, sccuri ty evaJ.ue.t1on of the equipnent. 'l'llf! ASAM...lt. contains no uove1 

c17Ptcprtnoi.ple and is similar to the .ASAM2·l,, e. t'!'letypei..r,riter encr:fPtion 

equtpm·.'lni. wll lalOW to the U .. .L and Canada. The J\SAM•4 is classified 

CONFlDl'W'l'IAL. rt 1a not anticipated tmt the ASAM-4 vill be rele&!!ed to 

Caned.a, Au.a ~.ral:Sa, and New ZeelBn4 unless a combined commmicatiotw :require .. 

Jr.ent with an7 or al.1 theso countl"iea is expressed. 

J~. .\a prescribed in Joint Action ot the Ar~d Forces, no Joint ci-yptogr&.f·hic device or publice.t1011 Yill ba made availe.ble tor Combined. use 

vitti..out th..- a.ppro'WJ. of the Joint Chief"s ot Statt. 

Inclosure l 

SECRET 
.. 

• 023 

CICllllr-1tteu p.;-i."h'tts relea9•1 ~ Sft:l\T7i' Cl'fJ1~i&.,Mr.- in:f4l'!Ll.tiQ'.\ to tl~e tt.K., 

Ca.i;w!.a,. A .. J&'l~ralf&,. ard N°IW Zt-a..\sxi. 

6. ?t 1a r-ecmmc~J4. tblt; th. (Joint C1rt.~f• ~ St..att ai1tboo"i!.0 th? 

Dircetm-• fbti.ON.l lk-cur1 ty Arflr._r.y 1 +..(.'J tl1"'clc&.l tho e!Q'Y'....op2"1r.,a:t~lca ot 

the AB!J.~'s (sm:rm) t.Q th?. C;v:rMr- PoJJey ~rl, 1.Dn"O"J, tor "~tlUTi tr 

nlA~Uc": to Caa&t,,., Aue t.r;11J ta,. N\11 ?:r w 1.r:~ U Ccd>tned C,1t.11'1.."\1.cat1onia 

niq\.J.J\:•rrN&t1 vltb any m- al.\ o~ tb~sl? ~untrics, which cw1 ~~ --=t. by t~ 

A.er, t~.t:)" Council. 

IoeJ.ooure .l 

SECRET