.. c~jE"yID:A2435745 • ~'f 

SSQisBT 

Op-20-N Sept~mber 16, 1942 

MEMORANDUM Ii'OR THE DIRECTOR OF NAVAL COl&U?fiqATION§. 

Subjects 

1. 

Policy in regard to making BCll available to the Britiah. 

Today, "Combined" (U.S. NaV)" - British Bav) com91catiom 

are unsatisfactory due to the slowness and unreliabilit)r ot Ba~ CJ]lber 

,!. 

No. 3 and to the differences between the ECM(U.S.) and fJ'pe •xa .. objM 

(British) which prevent mutual use. There are two practical ao1.utifm8 to 

this problem, namely: 

1. Conversion of the ECK and Type "X" to a cannon 

cryptographic principle. The ECK conversion uidt 

(CSP 1136) is in service and hB.s proven its 

reliability. The Type "X" conversion unit 1a 11Dde•: ·,. - ) 

construction at the Washington IaV7 Yard a.D4- aho1114~ ··~ 

be qompleted before the end ot this month. !hia .;,. 

al terna ti ve is acceptable to the British nb.ject' W-- "'. 

succesatul performance ot the •x• Adapter. 

II. Making the ECM a va1la ble to the Br1 tiah aJl4 a4opt!Jal 

1 t !or •combined• cOllllUDicationa. !bisalterna.t1.a_ 

has been disapproved by the. two prertous DiNo-._;, ·· 

of Naval CoI!mnm.ica tions (Admiral Noyes an4 ~ptaiJ( ·· 

Redman). The EOM cannot be made available to the 

British Government without the concurrence ot the~War 

Departr.1ent. 

- l -

Peclassified and approved for release by NSA on 09-19-2013 pursuant to E.O. 1352§ 

,,,,.. .· -
- . ' ~ . ~ •,, 
... ; '~. •. ID :A243S-745 

, ·.~ .; -~ ~ ~· .. -,t ; . . . : ...... -~"·-~~~x-~:r:·- .. ,_ ~--:.:...-. - . ·· .. 

as lost and anticipate th.at America eventually· will have to fight single-_ ·· 

. : - · .. - ;_,·~~~-I!-~-~~~ -~~~. ·;. ~~~~ ~~ .. ~:f_"~t~~~-Z}~~~-. -.. - -·.".'_.~-~i-." 1 

handed against the Axis._powers until a "neg?tiated peace" can be arranged,- , 

then our ~resent policy is sound. - . ~-.;:·· :,'.·_:·~ - -;~;: __ ~;· .- . :-· . ; ... _ -.. ~~~~k.~~-.;;~~-__::_~==== ... _. ·-

A defeated EngJ.and -vrouid 'surrender - I the ECM just as a defeated France - . - ~. ::,. ~~-~~~~:~-~~~.>:~-.- ~~ -~---~; ... - ~:L:. ~;_.:~·_J.~·~~-

surrendered the British 0 Alliedu Code:·· 

However, if our plan of ~r is to _r'.~ --···-···-=---~:-==~~;:~~- -·. -""~--~ -: ~-.s-_·;::.:::;-=_ 

keep England from falling and to 

prosecute the war with all our national resources~·to a sticce-i:fsful conclusion, our present policy is unsound and should be reversed without 

delay. I ( 

. ..--~ ·----- . .. '~-:.. _·•.;r,.::,., ... :=-c"-~-'E:.:::==-~-"'...------~·..../. 

It is recommended that this matter be referred to the . ~·I -::-=-_ .. -i,.-:. -~ " - --t ·, ': _ ,·F ~;..;r_-~;.-_-.-~.:_--~~-"--· 

commander in Chief', u .s. Fl~et, 'and Chief of-Naval Operation~i-;-·-r-or-his · • -r - .-- -;Y .·--;- -- • 

personal decision. . ' 

-.. ..:.- '::-.: .. '~ :.~ .. _}~ .. - ),· .. 

I • . .. • ::~~~. .-=-:..- _,"·: 

: ·Respectfully, 

Isl 

. _: .r·,~-irl ·. -·~;ig;ti· 

. ; ·>:' ....... -. :-. -• . . : - . ~~-~~-=-· .. +,~--- ---:--

Note: Captain Holden, (DNC when this'memo Vias submitted) -~d· 

' ·.i . ___ ..... _ ::., .·.- .. -:~~:..:.. ·. ~- .~~ ... -.03~ ·!1!~'·"'---~- -

.informed Captain Safford verbally that'he woUld s:ubmit this matter .. ~ 

to Admiral King for his- decision. Do not kri·o\i wliitli~;--this~wa-s--actUa.liy ,.,, ", ·-·"to_.:.. · .. ~ · · ., c.: . ; ~-. .. ,.,"itit:· .;:,~~=-~~~--, . ·.- _:""~ 

done or not. Nothing further vm.s ever heard of this ·Witter and the 

policy was not changed. ' .• ~ --~~--- .... - _:__. ·;_; __ 'to~ .... ·--; ~-. j·:e-;_-: ·:~<:-"'£'~~~·:.,.~~-:-- • .,~ 

Therefore, we vierit.ahead with the CCM program. ·-~ _. ==-~~-- - - . ·~ ·-

- 3 -