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workshop of the I I Thia 

_visit took place duci.JJg September c.. Octc.ber l9S2o 

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ARMED FORCES SECURITY AGENCY Form1 J~1~ 0SC TOP SECRET CANOE' -

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EQ3;3:(hJ(2) 

PL 86-36/SOUSC.3605 

. Thi:: an'8<"·itime ·pads are printed by· m. eleotrio typeuri ter at the . rate of .·7 characte!'S (oao apGices) per eecondo Up to S carbon copies can 

be produq~ &t the B81Dl!e time o · 

· The randomi~iDg elemants (of which there are mo - o• "tor. tape 

prodw=tio:'.1 and one for pad production) produce a r.steac7Jr stream of random 

bauds at a·· re.tie o! lS bauds pa:r Secondo The ~iming of the machine is 

determined by :!l multi.---c:ontact mtor~·-dl.'iven jo.ntping camq . The randomising 

prooeaa i:s initiated by a five millieecond closure of one of the jumping 

cam coni':;.aetan Through this oontac:t is appli~d the plate. voltage of a 

relaxe.tion oscillator gas....t'l'P3 tubeo 'l'his voltage also i& applied through a ~aist&nce to & c;o6ldensor so that the.plate.voltage> versus· 

tim CUJ."Ve.ti i'or the oacillat.o;:o tube 3 is of j;his form; 

'lbs av=>~-i.sd :volU.ge is couider'!ably greatez- than the minimum ~"'Oltage 

(shown by dotted linE) at which t)le oscillator. oaeillateso · 

-'l'n.e ost:illato.\' is tuaed·to approximate~ one hundred kilocycles 

per &econ.i; but this frequency varies eomewhat with the.plate voltageo 

The ou~p-i.1·~ o..t' the oscill&t.or is arr.pli.fied foiilf1 tri.age0 gaa ·tube) ·£.ll.ii 

drives:; e. f.lia:;--flr.-p, pn-.rJ.uoiog one ohar:.i~e of et.ate i.:1f the 1'1.ip·~no~ fo:• 

eac:.h ~rclr:i of the o;:;cille,t.:?.onr:i . 

illlf.llL t,be plu.te Voltage on the CE'·t:1J.li>,to;(" tlJ.~S . .falls cel~W thf. 

rdwram:;. U·...e oec:n::.aticn et.ops~ JGhG J.""..\.ip--·flcp. rs:ma.:lr•.s in "Q;hiehei;er· .est.a.tu 

1t lUlP"J!er.~~1 'i;o fa:i!. unt:i.:. t.he ple.te vo-lt&ge or the oscillate;: tube iff . 

:reuppl:lf.id by th~ W:'U:.t. c1oew.s· .vf tbe j"C&1lpi7.i.~ OUil.lo · 

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ARMED FORCES SECURITY AGENCY 111111 J~l~osc TOP' SECRET- CANOE, . . 
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During the t~. ot non--oac;Ulation a pula.d.zed relay is ·set up,· according 

to the state of the .fl.1:p-fiopa The output of th.1.s relaJ' determ1ne11 . · whether the signal is to be "hole" or "no--ho,_~r.;i) 'lhe parity of the number 

af c7cles of osoillat1on determines the delta pattern of the bau~ &treamo 

Since the .mechanical and electrical operation of the plate voltage S1!,PPl1° ' 

is e11bjeet tp variations, the time during which the osoillations talc& place 

is 'V8l'iable9 ' and the number of c:rcles per. baud ia determined onl1' within a 

range of approximately one hundred. ,cycleso Since the renlt depends onl1' 

on the parity of the number of cycl'ea, it eeems ~vjdent that the sequanca 

of bawls produeed should be s~tistically rsnoa;mr, · • I 

The output of one of the'randomi.zbg elements goee directly to a 

tape pmoh, the reBUl-t being assembled five bauds to a frameo The out-o 

put of ihe o~er is u6ed to aet up a 1!.Cbri;stmas. Tree 11 

9 which, after five 

bauds, is, probed and the resu:Lt is either suppressed (in which case the 

·tJ'Pft!'iter, does ns>'tbing) or is tranalatsd into live timed pulses :rePn? 

senting th$ aPP.fO.Pr1ate c~tero Uthe pad i:s to be alphabeticii 26 

o£ the 'Values produce ~ha.meters, and the other 6 ...._.., euppres"edo 1:t 

the pad .. ~ to, be digital~ .30 of the 3~ outputs o.t' the r.icbristmas Tree" 

are grouped:into lO groups at 3 each:, _a..YJ.d ~ shot on any one of' the three 

lins.& of e. group~ produces a $ 'bflud-signal foi .. the printing of the 

appropris te d~t,, ' · 

'l'h.e maf.!:t:dne can also be set up 30 that the fiv!l bauds of one "thrc:nr19 

dete~ine 11bether_the next llthrcm" is to produce an alphabetic or digital charACters vith tbe choice oz probabilities-for a digital character ot 

one hal.£ ;i one qua...-ter g one eighth or ows \ si.At:eeu.thc 

. ' • 

'rhere are switches cm the :machine to determine the number ot '3pat:es 

between chara.oters:; the number oi' characters pe1" group~ t:ti.e number 0£ 

groupa par line, t.be u~mber or line feed:? betileen lines 9 the number of 

lines per page, ancl the number of line feeds bet'!Yeen pageso l'henever 

a space, line feed. or cai-r:ia.ge retllrn iB- executed ~ the typewriter 

the character f01• t.hat •Dtlu."CRI'" is s.upprosscdo Tbue in computi.11g tbs 

time £or a jobJ epaees,p J+mt fe~ds;; BI"..d Q6\?T:i.&ge returns muot be caunted 

as nll an cha1•ct£irs.o lla:diDUDI line lengt!1 i1l 66 cbaract1ars a!J!:i/or apaees 

per l.L.""leoThere is provision for suppre~sing oqr: s.tld "zn when t,bq occur &El 

\ ~sulte of a "thx"OW1i i"or ·the first cbar~t2r o:C an alphabetic or Jlllzed. 

group., Whenever a supprespion. a:f' a charact:er oecurs the time of that 

r.itlll'O'fj11

9 ioeo1 one seV9nth of: a secondr, ls lost-. 

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ARMED FORCES SECURITY AGENCY Form1 J~1-:i osc TOP SECRET CANOE 
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. ~ .REF. ID:.A59040 ~ 

·~· -P ,SECRET CN,OE • '· 'l'ldii 

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be Nail. oal1' b:v tb088 ~ omalall:v l~ ID ae.. -•-with - ,. m1111laatloa balielllpDee .-rlt;v legialatlona and a11tborlad to n.ift tlui lalmmatloa. nported laanla. t • - I 

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86-36/50 USC-380q . ' . ., ·', ~ · . ' . . , . . . ,The machine "IJJlf¥" be set up so that if, in a given 11ne9 a clmracter 

(digit or l.8t.ter) ha' previously occurred it will be eubaequentq,wppr9seedo 

The result 1"'a·~mmam:cy- ac:rambled complete alphabet,. or sequsnce 9£ ten digi~ 1 for each lineo · 

~ - There are tvo s'ts of. six colmtaru each., One set is used normalq 

.with the tape ~"'Oducing die;; one cotmtsr for -e cbaraotctr count, and the 

other fiTe for levelwise counting \of qholesr. o 'lbe 'other set of counters 

ie noniall1' used with the pad prodvcing dl-e, one counter for a cha.1--aeter 

count, and the other five fw chsr11cter category CO"'Jnts<> !he die for 

pad prodU(?ing can aliernatively be connect-~ to tho levelnoe com1terso 

I ..... ._ -fo J' I "' 

~teppiDg ·at both ~s· :le controlled. b-,r the input k~ard or tilpv 

readero T~benever the deciphering unit gets out of phasG-\'llith the en.-

cipberi..~ unit, a plain language signal iB 1.o be sent back requesting 

-; a~nn st&rt at the next bla<:k.o Blocks &l'e probabq to be .ti.ft,- chanlcter;s 

long_, block nwnbe1·s being print.et:. on both tapes_. "Which are to be produced 

siailtaneousl,y b.r, a :sing~ punch9 ueL'?i6 &p:ecially pnapared rolla or pair11 · 

of. tape wit:h ~arbon paper b9tween~ 

'6 c s 0 l!:!t~ eHllf .. m=a_ _i=' .. 1111':1111'1-~...,..... 

ARMED FORCES SECURITY AGENCY 

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, , , ~l? SECRET C:A:~-OE '" Thl8 4-t . be _. onb' bJ' thCll9 ,... ollclalb' lmloet:rlaatacl...... .. .. with - mualaatlon latelllpnce-=W'ity n,illatlou allll aatliorlmll to noalwi tbe lafarmatlon nparted henla. 

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. ' . standird procedure i'or checld.ng .!ll&terial norr bed.ng prod:=ed by tm 

;two'•mchmes 'ah-eaa,-. in operation is ·to run ;for pt'l"bape halt an hour with , 

· tbf.i colln.ters on at the beginning and end of a l"'.J.lto If. bot.h t.eets :show rlll:td!J:J!. 

~valueG tben th~ 1--un is e~su:med to be ell righto 

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