REF ID :A6602·7 

DEPARTMENT OF DEFENSE 

ARMED FORCES SECURITY AGENCY 

WASHINGTON 25, D. C. 

' , 

IN RBPl.Y RBl'BR TO 

AFSA-OOT/dk 

__ serial =00293. ~ - ... ... 8Ei0RE'f 

Mr. John Cloud McPherson 

V:lc e President For Engineering International Business~Machines Corporation Endicott, New York 

Dear Mr. McPherson: 

8 JUN 195t 

. I am enclosing herewith, in accordance with our 

recent conversation, the publications which I promised to 

send, Inasmuch as these publications are not distributed 

outside the Agency except under circumstances such as the 

present one, I shall have to ask that you restrict their 

use in accordance with the security regulations applicable 

to SCAG. Will you be so good as to sign the enclosed receipt and return it to me at your earliest convenience? 

·May I take this opportunity to thank you for your attendance at the recent conference, and to say that I feel 

certain that SCAG will be able to contribute much to the 

solution of certain problems confronting us. We shall look 

forward to seeing y~u at t~e next ne~ting on 10 July. 

Sincerely yours, 

Enclosures - 5 URL B. 87:011 

I i' • 

~1• dooument. oont.aiua :l.ntol'tl&1iiot Rear .Auiral, u.s. :laYF 

atteot1tts the national 41t1a1e of"lreotor,_Anlled 7oroea Soouri\r~ 

the United states witb!D the mean• 

ing ot the £19piot.i.age Lawa, !S.ile 181 

u.s.o •• Seotivns 793 axi4 19,. !he 

transmission or the revtlation of 

its aontent• in IU17 maim.e~ to au 

UDBUthOri•e4 p81'80D ia pJ'Obibit'4 

bY law •. 

See also Public Law 513, , _· I?.& f,,._y",J ~ 71k. 7'>,,P~ .• ~ 

81 Congress second session -. /' ~6' si . 

eclassified and approved for release by NSA on 04-15-2014 

ursuantto E.O. 13526 SECRET . •' . ·- .· 
I / 

' I 

, 

' ' REF ID:A6602 •. 

. ... 

Va·. John Cloud !:ic.Pheraon. 

Vice Preaident For ~ngin~ering 

International Bu.sinesa Machine• Corporation ~ndicott, New York 

;)ear Vlr. HcPheraon; 

itF'.:JA-Ou'l'/dk 

verial: OO 29 3 

9, JUN 19r;f 

I am encloaing her•with, in accordance vith O\tt' 

recent conversation, the publications which I promiaed to 

send. Inaamuch as these publications are not dia~ri~uted 

outa1de t.h• Agency e.xc~pt W'.ltler circw:tBtances such aa the 

pi-esent. one, I ahall have t.o ask t-hat. you re3\,ri~t their 

uae in aocardance with the aecur-1ty regulation• applicable 

to ;;..JCAG. riill you. be so good aa t.a sign the enclosed receipt and return it to me at your earliest convenience? 

Hay I take t.h is opportunity to thank you for you:r attendance at the recent conference, and Lo say that I feel 

certain that SCAC will be able to contribt.lte iltUCh to the 

.oluti on of certain iro blema confronting ua. ~1e shall look 

forward io •••in,g you a~ th• next moetine on 10 July. !hi• 4eownt •OD~U "11ff1W'ifa 

atteoti°* tht IM!ltioaal. atttdt ot Sincerely yours, 

the United States within the mtaD• 

i!28 ot the Es~·::··· '-:: Laws, Title 19, URL I. S!OD 

u.s:c .• Seoti~·· · ·· ... :. and 794. The· Mar Adairal, u.s ... ., tranamisaio~ or the revelatioD ot D1reotor,.Armed loroB~ Socuritf Agettoy 

/ft.~ -~•te 111 any ID8Dller t.o c , ~ JeJaoii u ·proJd.1>1te4 

/ by J&tGy of ~~t~~l!~ic.al •. tb.tqry of related cipher alphabets, Section I.· 

1 CopYS9(1150h~MWU;~vvtH~O"ry of related cipher alpha.bets, Section IL Cop~ ~f~iA~J.iftt'iii ~Kn4 ~ico-electrical cryptograph, Part I. CopY8if\.1tUU£~Se~'!u~ 'fnevC'n.anico-electrical cryptograph, Part II. 

Two copies of receipt for above enclosures. · 

,/ 

I 

.I 

Cppy to: ., 1 :•I rC I AFSA-OO'!C 

AFSA-11 (3) 

SECRET 

Mr. W .F .Friedman/dk/9Jun51 

AFSA-OOT, .Ext 60240