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~fMD:A71048 

iE~a~~ SIG-?W. SECURITY .AGENCY 

TO ~to l ~ .. '(../- FROH 

- {' -...-- Cormi.nding Cff.f'iaar • ...,-

--A.ssta Cor.mr.nda.T.i - --;;r Dir, of CQ'll. Research ---

.Adminlstrative Of'f'1cer-- • 

--· Chie .f', I & L Bram h 

--Chief', .A Branch ---

--Cluei', B Branch 

---- Chiei,, C Branch 

--Ghl.ef, D Branch 

Chief, E Branch 

- Chief', F aranch ---Chief', G I Branch --- Dir. of' Training 

--- 2nd Sig. ~v. Bn. 

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CC11D11Bnts & Return 

---Information .. (6) 

___ Signature, 1.f' aJ?1>rovad ----

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Declassjfied and approved for release by NSA 

n 06-02-2014 ursuant to E!. 0. 13526 
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REF ID:A71048 

-.. --'.,,-. .. • Ot~1oe ot the Ch1•t Signal Officer Action 1 SP8I8-) 

Chief# Arlq Com\micat1ons-Serv1ce. Room•• 25'• Pentagon. 

2 August 19'11. 

SecUl'1t~ Olaa11t1oat1on or SIGSALY SPSIS ,ll.5 

S1.gl3&1 Seeur1tJ' Branch 'C 340 Code 8129., Ext. 215. 

1. At the- present time all pbaaea ot the $IGSALY qat• a.re 

cla11111t1ed aa Secret and the ha.udli"lg ot all ptt.pers--blue~inta# 

apec1t1oat1ona, ke71.Dg devices, etc., is Ol1 a !f?op Secret ba.sia,. 1n. 

aocordanoe with d1root1ons tl'Oll Cbiet, Arw:J' COlllaWlioationa Service. 

2. Th• llonJal me-tho& f>t claa.eif'fira~ aeCl'et Ol'J'Ptograpblc a71teaa 

1• to use • olaae1t1c&t1on ot 001).f"identia-l ~or ~ e~ul~ 1.AYClved 

1 and & olaaa1t1cat1on or seeret tot* the k9J'iJlg elements. 

) ' I 3. Specific ~IGSALY cle&t'&Dce of peraonne1 al.re&~ crJPtogr&ph- 1c&llJ cl•r•d 1a ot a n0Jt1.Da.1 mture onl.7• 1D tbat it dOea not involve ~ add1t1o:aal 1Dvest1gat1on, but operates J9.1DlJ to ~estriot admittano• to ~ SI05ALY tei-111D&1 roou. 

31 JJ. 'fh• baa1o pr11lc1plea ot the SIGSALY a7stea (th• Vocoder) bave gf beo P\1bl13hed 1n vartoua teclm1cal jourm.18 &l1d have been aubllitted ~I to'l' patent1Dg althoUgb at the present time •11 or these p&itenta are ~ be.f.11g V1thheld from iwaue under P'Qbllc i:..11 '111. 

,:i:~ 5. !be 4e••lo~t ot U/GSQ-2 1a prooee41ng ap1417 &11d 1t 1• 

'-~. expeo\e4 tlmi\ un1ta V111 be &W.llable for field teat• 1A Jlaltoh Of 19'5. 

Th!a etm...-nt 1s a oond8D8ed v•a1an ellboqing aoat o~ the pr1Jl01p1ea 

· ot the SIOa&Lt' a7at.. w1ib the exception ot the &IOBUS and the SIGGROV · .. u1pzaent. Owing to 1t• poaa1ble V81!f v1cte 41au1but10ll the AR/GSQ•2 eqUipment can on17, v1\h the exception of the k9'f1ng elaenta. be 

claaa1t1ed aa cont14•nt:tal. 

6. a. 'l'be preaent ala1111f1oat1cm lllpo••• a bur&m on SfSA. pe- aonnel engaged 1n VOJ'k on OJ' 1D omm.ect1on v1tb tb1a •J'•t• aa strict 

.dhel'&D.H to aecwitJ' ngal&tiona ~eelwle• 41•oloaure to one who 

.Jlll.'1 

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be concerned v1 th the 117at• 1n a genual V&J • e onl7 on aome probl••~ but vho baa not been apeo1tlo&117 ol-.red t~ mowledge "-1--~t thia BJ'Btem although oarJ!71D1 a general ol--.nc• tor OQPtop&phic ~;V01"k .. 

~ b. !bla bvd..- 1• alao 1Jlpoae4 on SM pnacmnel engaged 1n ~""'the 4e••l0Jl•Dt ot A11/08Q•2 vho are preYeJltecl troa d1acuas1ng the "~ equtimea.t nth all 1.l'ltereated personnel ows.zw to the lack ot oJi,e&l'&DCea. 

fh1• burden ¥111 beooae estr- vban the .UJUSQ-2 equipment r•chea the 

servic• teat atagea. 
I Ill .. r -1 REF ID:,.A,71048 

. t-·-r· • .. 1t II r, ' \I I llol 

' \ . o. lt vou14 be ol-.rlr 11DdeaU.b1e '° ol~ au peaonnel engaged in Alf/G~-2 develoP*D.t &D4 ••l'v1ce teats ,,. SIOSALY, l 

I 4. AN/QLQ ... 2 vlwn 1caue4 vill be ol6asu~1ed •• cannden.t1&l 

in accOJ'danee v1th o1ll'rent pre.ottce 1n th• cue ot other o1aa•if1e4 

· , equtpmnta or a11111AJI nature. KeJilJ& eleMDt.a perta1n1ng thereto v111., hov•T~, be olaaa1t1•d aa aecNt. 

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7. The follov1n& HCo..-d&t1ou ue 1nWnde4 to dtect ti. 

phJ'a1ce.1 equ.1.pment ano. 1ta band11ng, on171 and do not atteot the . •JS'-'• ue and ita peraODD*l. · 

a. ~he ~Jo<.JALY er~u1P!l8%lt be cl:u1aJD.e4 as SeO!'«-'t• !!'he tiIOBUS, 

SIOGRtJV • ant\ &11. ke:r table~ which are n<>Y olaaair1ed e.s Hecret would. 

remain secret. 

b. !'he present a~t~t ob•Rvance ot admtttance to tftllln&l 

l'OC.• be COJlt1uued on. a l!at ba:J1-:. (1'111::- is normal enJ)tcg;rapMc pMctice.) ~e 11at v1u not 11eoeaear117 ret'lect the total n.Ultbe ot 

»tople posaea•J.ns .knowledge ot the e7atma, but·W111 1Acllldo onl7 tho•• 

!saving acoeae to a JJ&J''ioul.&r t81'm1.Dl.1 1'0om. 

c. Plana tor 1nstellat1on ot tem1n&la t~nd their location• 

be claas11'1etl es SeC1'8t unless the knowledge ol •uoh looat1•• 1Dol1lde 

lmovle4p ot troop aov-.nta eto •• or otbe •t.t•r• vbloh vould requ1i-e that the '9Nlla&l locat1ana bo held as Top tJeOHt. 

4. '!he ~10$/\L'I cUrectOZ"J' be cOflUnued aa o. aecrot docuullt 

and tlat tbe people authorized. to use the aptea be Nstrlcted •• per the present &J."J'&Dgeaent. 

e. 9.'he OP9P• be cont! nue4 &a a ••crot devS.ce BD4 1Dtol.'9t1on 

theiteot- be ha.D41•4 1n she nol'JD&l mnnv tor secret 1ntom&\1on. · ' 

t.. 'The Recorders (110-250-Tl) (uaed tw proctuct1on of SIGGRUV) 

be ola•sU1e4 aa aeept 8lld &11 1.ntor-.tion tbeJteo'f be bandle4 1n a 

normal aocret'marmer. 

9, lf" the :r•commendat1ou of IJ&N.Sl'&Ph S an approved• 1t ia 

reco••Dded · tbat .the SSA be dil"ected to take the necea1&17 aot;1on. to 

s.nton &11 cm:acero.e4. · 

w. heatOR COl'dumaa,, 

Colonel, 8ipal Corp•• Chier, a1aaa1 Seo•1'J" B1C10h, 

SPSIS-1, Code 8129, Bztr- 211