William F. Friedman NSA Archive - Staff Study Memorandum Pertaining to the Modification of the SIGROD Plan to Implement the Combined Cipher Machine and Friedman's Nonconcurrence for Action, 1946-1947 - 4in1

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Files W.F.F. Archive Correspondence, Memoranda, and Personnel File Records Staff Study Memorandum Pertaining to the Modification of the SIGROD Plan to Implement the Combined Cipher Machine and Friedman's Nonconcurrence for Action, 1946-1947

Meeting of the Executive Committee, Security Division, 6 November 1946; the Situation Concerning SIGROD

Document A70271

Staff Study Pertaining to Modification of SIGROD Plan; Comments by Sinkov and Friedman

Document A70267