Cryptonym: ODINCH
104-10219-10106: CABLE IDEN WILLIAM HAMILTON MARTIN, EX EMPLOYEE ODINCH
1/23/62, FI/D Anita Potocki writes cable to Mexico City about how William Hamilton Martin was "ex-employee of ODINCH". Well-known that Martin was employed by NSA at the time of his defection.
104-10176-10019: TWO ODINCH GRADE GS-11 MATHEMATICIANS DEPARTED TWO WEEKS LEAVE
9/16/60, slugline RYBAT GOOSECREEK ZRGRACE from C/FI-D William Harvey to various stations, EYES ONLY to GOODING: Discusses defection of Martin and Mitchell "had access ODINCH info of critical importance". Both men well-known as NSA employees at time of defection.
National Archives Research Aid: Cryptonyms and Terms in Declassified CIA Files Nazi War Crimes and Japanese Imperial Government Records Disclosure Acts
The document states "ODINCH" is the cryptonym for the National Security Agency.
104-10219-10227:LIMITED INTEREST IN INTERROGATING WILLIAM MARTIN
An internal Agency document states "Have discussed Ref Case in detail with ODINCH" referring to the handwritten note of William H. Martin. Martin was a former National Security Agency employee who defected to Russia and rebuked the US government publicly.
104-10077-10396: DIRECTOR CABLE RE CONFIRMATION THAT THREE VESSELS HAVE RADIO COMMO
12/11/63: Cable from Director to JMWAVE (Orig: S. E. Darling, Unit: DC/SAS/MOB/FI): Slugline TYPIC AMRIPE INTELL: "1. ODINCH urgently needs confirmation that three vessels cited ref have radio commo. If so require info re transmission frequencies. 2. Defer's WAVE judgement whether query original source AMGLEN/9 at this time. But would suggest requirement be given AMTURVY net. 3. Please advise."
104-10413-10403: MEMO: TRIP TO MEXICO CITY
04/22/64: Warren Commission memo for the record from David W. Slawson: Page 28: ..."Back in the CIA offices, during Willens' absence, Slawson and Coleman discussed the cable traffic from the Soviet and Cuban Embassies both during the time of Oswald's visits there in September-October 1963 and immediately after the assassination. Scott and White said that no increases or unusual variations had been noted at either time. We then discussed briefly the possibilities that the National Security Agency might be able to 'break' the codes for the times when Oswald was in Mexico City, using as a key the fact that Oswald's attempt to obtain a visa was probably communicated to Washington on Friday or Saturday, September 27 or 28. Scott pointed out that all his office did with coded materials was to send them back to the National Security Agency in Washington in the form of which it obtained them. They felt that the code-breaking might be possible, however, and should be tried..."
104-10219-10078: DISPATCH: DR ROSCOE WHITE CONTACTS WITH MARTIN.
09/15/64: Dispatch from Chief, WE to COS, Withheld: Mention of ODINCH. Originating Officer: Birch D. O'Neal, C/CI/SIG, James Angleton, C/CI.
104-10234-10382: CABLE: SITREP 12 FEB 65, INTELLIGENCE HIGHLIGHTS
02/15/65, Cable from JMWAVE to Director: Sluglines RYBAT TYPIC YOBITE: "1. INTELLIGENCE HIGHLIGHTS:....C. KOLA AND KUTUBE/D: UFGA 19834 (LAURICLE) forwarded AMLAME-1 (Cuban exile Arturo Suerias') production 2-9 Feb for ODINCH (National Security Agency) evaluation..."
104-10408-10436: CABLE: ON 20 JUNE RECEIVED LETTER AND ATTACHMENTS SENT BY LUND
06/20/67: Cable: Slugline RYBAT GPFLOOR: REFERENCE: DIRECTOR 12232: "1. On 20 June received letter and attachments sent by Lund. 2. Will attempt actions suggested; appreciate guidance." Handwritten note: "Ask, this concerned info that NSA passed Jack Kaufman for relay to COS, Mexico, the info having come from State Dept in Mexico + concerning a person who said he (unintelligible) with Oswald there."