_ ..... ~..f ... .J~:A67~28 

RUlilii!I 9 

~RJ'd-1 -

AIU.IITGTOlJ HALI, STATION 

Date 

Lng ~ri:er li'ROU 

-· 

Executive 0.fficer --------

--Asst. E..""tecuti ve Officer 

--Atlju'tant ------

--Asst. Adjutant 

CM. e f, Hcadqual·ters ......... --=,..----..-------- Branch --Chief, A. Branch -~~--

--.Chief, D Branch --------- . --Chief, C Branch_.__ _____ ...._ __ 1 

Chief, D nrarich --

__ Chief; r: Branch_--=- -------- __ _. .___. -·L~--, 

Chief. P Branch 7 ---.,. 'Di.r. of. . Coo. Hesearcri -~-.,.-~-- ~-

Dir. of T11aining --C. O. o:t Troops ..__ ______ , 

~operty Officer --Personnel Offico_r _______ _ 

Provost Harsha! 

--Classified !lail--noom. ______ .... Secretary to c. o. . --Fila Room --.---------,,...,., 

- .r-.:-- --- - ·Comments <\_ Return -----:-neco~cndations ---------

Information 

--. Infonaation ------------~---- &. Return ~Inf. & Forwarding -----------

~ ·--your Inf. & File 

Signμ. tu-re, if .>."::':'.p"""'ro-:-:ve~r----....--_..,.. __. 

--see ?rote on Back -=---------~------=--~--~--~·--=-~-.-.,-

.a.s Requested --- ...------------ ___ A~ Discusao -----------__._. --·---· __ Your Action By --- ~------...,----
_ ... -"!"""--

. . -.... . .., • 
REF ID:A67328 .... ·. -

SECRET 

23 Jum 1913. 

llllD.AIDl1M 'al C,OLClllL CWlll• 

SUbje•in •'1'1 4latr1bu1;1on of State Departmnt material. 

. . WbetbH" OI" nob the •v ebould f\1l'n11h & a\1111&1')" ot State Depal"tm!Jnt 

clispatcme to the liait!1h oan not; be poaitiwJT &JJ1'119Nd b,- the s.s.s. It 

seems to ma, howawr, t!at U' State Department 1ntormat1on is to be dis• 

1em.1nated .. it should be dom by the State Department and not by tbs l'a'fY 

01" ti. Arllv· 

'fbe s.s.s. baa tor sams tme served as adTiaor to the State Department 

on c17Ptograpb10 aeourtv. ~ oE their ceyptograph1c aratema wre prepe.zred 'b1' tht s.s.s. or 1n oonsultation with ua. At present the State Department 1.s using or,yptograpbio 179tema with a reascmable degree ot aeourity". 

B'omever. it is :not unlll:elY" that manr ot tbm can be read it an emmr m.t1on 

should mm every ettOl't to do so. Of course. &JJ1' ot the uyatema are RS• 

oeptible to phya1cal ocmpz-omise. 

J.saumi:ng 1"b is desirable that the British be turniabed the intonation 

1n ow State Department diipL toha1• it would &1118.)"s be possible to cmnge 

tho •J"Btems pran.ptl7 should it be decided to no lOJJge:r publish the d.iapatcrboa. 

fhia would prOTide som. inrlediate security, 'but it oannot be deni9d tlat by 

thi1 time the Dr1ti•h ooul.4 !ave gaimd. a omusidarable knowledge ot our 

•J"•'f:ema and ~ mthod ot use. 

For greateat pl'oteot!on atter the em ot ho•t111t1ea• I thil:Jk it -.ould 

be a good idea to Jaw in reaene a canplete ebmge for ew17 •)'Stan. used by 

tbl ftt.tt Depa.rtmem 10 that immsdiatel.y al'Jlistioe ccmes entireq mw lm~ 

will go into effect almost autcmatioa117• At tha.t same ttm umoubte4ly' 

•11mariea will be stopped • 

.U a solution to the !mediate probl•• it 1s 1uggeated that the tom 

ot the 4dl.J' •1mlal'I 'be obuge4 to & dipa'tl in wbioh all ntenme1 ta d&te•• 

••aage mnnh•J'a, ew. would be •lim1mted. All man.pa •hould be ompletel.7 

pan.pbrae•4 with all quote• naowd. Tb18 would iJJ.creaae tbs d1tt1oulty ot 

ualnl: puaphraaee as •orib•• &D4 woulct otter a 111d4le oourae aaue~ the 

leas\ aount. ~ em.bura11m1ab to all o.omermcl. 

~~~~~.Sig •. ~,, ... : 

~ -SEcnErw,. Pl'eai:on CGl'del'llLD,. 

Colonel, S1gzal Corps. c.,,..,,dimg. 
I 

\ 

I 

~ ~G----- --·- a • 

U f I NG AND \v'CRK SHEET 

(PAR ·9,,6l v.R.1 

Sc3SIW't 

By Authority of t'ia 

.21..!!i ~nal 0!:=,~ itlals I:•c.te 

I ~·-••""l'i.~.-~, SUBJECT_~~~~~..-:O~N~I'--"B~r~i~·e_f;;_.,.;o_r ___ T_e_l_e~g~ra_ms ____ o_f..._..D_e.p_a~r_tm._e_n_t ___ o_f_...S_t_a_t_e_'.~ -~ 

========:;::========::;:==================================:=;:::==:.=:==--=~ =-===== N~~~~R 

ACTION TO Mt.MORANOUM 

Colonel 

order.1?1.an 1. The roblem as to whether jill.,,..e __ ~----·~---· -·~-

Na'Vy should furnish a summary o!' State De-

__________ ,._ ______ ~ __ ...,..r.i...r...i..l2:.~aA~~"'"4l~.W...-..i""" 

this information, howeverJ 

~--------o4------------+~~~h~~.r~e-=i~s...:;a...;z~.lid reason, 

2. The _9_~~st_PeEartm.Ji!.llL.is l.!~!afi_ 

oryptographio systems 'With a reasonable 

~--------""-----~--~~o2.&•~e Q~ §equrity1 ?&;w~fllisages handle 

on the Washington-London oirouit are oryp-

·-----111111---

.. _____ , __ _ -------··--·-- -----1-------.1~~~~i;;;e~rl-J..,.· D.i....so~i....,g,a-..:vaQ,J,l:te.m....w.biab iJLhi~~ - --·--------- oure frox:i crypta.na.lytio attaok. Most othe 

-----a-.-------1.-t:.;:;at~_P.Jmia..t.tr.\<W.!;nh21-.s!.~ .Y.§L.2.t.'UJ."t.OKta hio - .. - .... -----·-------·· systems whioh are reasonably secure al-

-----i------~tJipuc;h~t o;C th2..,..QI..cliU:,.J2t.....t.h.~..Lwl.<12...~§.h -····~-.. -·"·M-·--,--.,_ ington oirouit. The general quality of th ________ ._ __ ~~--~+;;;s.t .... a~~2~~.i.~tst~~h!§...imEr.oved im.-

neasurably sinoe the beginning of the war. 

------~------..a.;;Al.LS.fiate jp;ear~t..i..~taJ.1.~i~Lia. .. ~.Cl'.. ~ ............ , ..... 11 ,_, ... ,.. ......... .-... , ....... 

olass of embassies, legations, plus some 

_____ _._ _____ .............. .....a..l!IMJl,.liloM~-ll.slld-e.litiJ;2....!2r. mA.Qbj n~~.a.t.ema...:C.c ---.. ···-~~n .. ·--···· ... ~ .. - ... handling secret traffic. Further, all se-

_____ ,... ______ ...,.c ... r..,e~!f_.t;.iS!.,i.L-~.Jll~-:i:.ll....~S-Q..hi!\~.-<2.t.-.. ~·----.. ·-··-·-·-·- strip system. ______ .._ ______ .. __ ..... ._... ......... wre' .... RmoU_..,_.. ...... ________ ............ ___ -=-- ........................ .!r '111'111•1 ......................... -

3. It is entirely true that para- _____ ......, _____ ~!1J3...,..a;Nis~e-s •. 9..:C...!V&!.Ml.TM-~~:C-a.c;.lt..t...z!i: 

ltte in breaking into a cryptographic sys-

----~.,_. ____ ....... t ... E?.m.t..Jllld !hiL£!B".!Li.~ ... IHJ-.~.m2.~.-1UR. 

entirely possible that given sufficient 

II • -" f ••• i...;,.i.. +.i..,,.~- ..,.,,..,. ..... i.,..,.,.,,,.a_nn"1.:I• . ______ ,.__ ________ ...., __ , ~.-.........~~lrflf'IWllllW ""''*'~ ............. Wl ... ,..-.-,1111.o1•••1•11n1 .. 1•-· ........ ¥ 

be), the daily keys for the generally held 

___ .,_.,..s .. t..,rU> .... UJ!j;~IJ. .. ~~~~~P~r.'l'.S..._1t ... iL -------··-···__.. .......... _ not believed the system used on the London 

__________ .,_ ..... ..._ _____ ~p~JY!!l..l:!.~t9.n.....2!.!:.q,,q!:li....s.P.!!l~!....Qr.£~a.~v.r.Y~=~ 

tanalytically in this w.a.nner. Of oourse, 

_a.~.Qf' ~-~Af.f1.~ .... tA-.. ....,. ___ ,.., ............ -~ .. --.. ··•· 

physical com.promise. _____ ,,._ _____ ..,.rllllWllEW ut-•W91..-..1911i..ll .. 'lm.--............... ~-·----·'llllliii~ 

4. Assuming it is desirable that the 

_____ British be furnished the in.formation in ,._ _____ ,..,..,_._ .... .,~....__... .... ,.,!Hilllol....,_~ ....... ..Dldt........_11B1&t;Lr:m-·•• __,__uu.:r.1r , .. ....., . ....._, .... ;.W9. • ......., 

our State Department despatches, there 

sho~!S.J2.e .__......._.._ n.2. gr~t t e ..... 

~ 

~ ... ~lllllll'IW- -·-----·-·--·- ....... T· I I "'It._•_ 
. . • SUBJECT~~~~~~~O~N~I~"~B~r~i~e~f....;;.of=-~Te~l~e~g~r~am.--s~o~f;.....:D~e~pa.r=:.~tm;;;;.;;e~n•t~o~f~S~t~a~t~e~"~~·~~-­

( Cont 1 d) 

- N~~~RR A TION TO Mt:MORANOUM 

Ill AM E ., ~ I V ! S I 0 N 

OR'S aN~H At4D A E' 

1 ~ 

(Cont'd' curity of the cryptographic systems with ..... -- respect to the British providing these 

svstems can be chanll'ed immediatelv should _.,__ .,._, ___ ,_...,..._,_,__.., 

it be decided to no longer publish the 

desnatches .. The svster:>.s in use in the -------.... State Department could be easily changed nrovidin~ suffiaient tir.te were e:iven for 

the distribution of new keys. ---- ··-----.... ~ 

-----···~-.. 5. As a recommended solution to the 

nr,sW.lem. the forrt1. of the dailv s11mmarv w ._,,....._....w_ ..... ._.._ 

might be changed to a digest in which all 

ref'erent"!AA to nA..te~ _ mAA'"'" Poe num"h""T"R P.+,. _ -.-..-.... .......... ,,,,_.... ....... _ ..... would be eliminated. All messages should ~.,:tltoroul!'hl•r ,.,A,..aT'lh,.. .... ..,d ...M +.h .. 11 ,.,,,_.i-~- .-.... ...................... .._.. ........................... -. 

reM.oved. This would greatly increase the 

diffiP.111.tv nf' 11<1ins:io ,., .. ,.AnhT"Aq,•<"• aq A II n,..; 'h I .,.a.-........ .. ~.._ • ._.._. .... Slim. •1 

and would offer a middle course causing - the least amnnnt nf AmbarraR.,"\ent +.n t:fin.,e - __ ,__. ........................................ concerned. 

---.. 'e/Jl:f=-·--...... ,. .. - .a-1--1-~,..i.....,r1. 

. (I J;ia..r-Ui..a.J;I ... ,'f]j ~-.. .. . :,11 Memo for Col Clarke :Major, Signal Corps 

r'l+.A 1 fi .Tun A 1 Q4~ .... ~togrfW,.bj.,Q,..ll.r, 

- J/.') 

., .... Jlemo for Col Clarke 19 June 1943 

D+.n 11 l.'air 1 O.d~ 

w/ Encls. A& ---·----•1153!'1'1\fll ... ..,. ................. _ 

B 

11.., 13l.1~1k.~ ;~ f rm CoJ Ql 2 rke ---- ·-- ............ , ... , ............. //4 Buck Slip frm Col Corderman 

-· • __. ......... ._..._.~.S=-"1-...... • 

•Al!lra•Blll•11-! .... t-11'9.l'BIWL.M?.IP' ... 

·-- '1~~.__......,._.... ........ , - --- -· •ll ...... AM::...... n._ll!!mlt.l__,.!198' ... _ - ... HWA ALW -~-.. ---"LP-W ... '111• 

a maw --- ...... ~ .... ---a:::aw--.-v.• - - • ~---~ ......... 

== ........ ..._._.... ........... &UWWWiYW- ~ WWW--·