Cipher Compromises

Document A4148537

59.18 KiB

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Comments on "Security Of U.S. Military Communications"

Document A4148542

93.61 KiB

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Comments on Cmdr Weeks Paper

Document A4148544

106.42 KiB

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Drawings of Cipher Messages

Document A4148539

213.48 KiB

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Loan of Documents from Op-202 Archives

Document A4148538

45.92 KiB

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Memorandum for Mr. Friedman In Reference to the Degree of Confidence We Can Have That the Germans Are Not Reading Our High-Grade Machine Cipher Traffic

Document A4148541

298.27 KiB

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Security of Information Derived from Field Intercept Sources

Document A4148545

152.09 KiB

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Security of Our High-Grade Cryptographic Systems

Document A4148540

699.65 KiB

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Security of United States Communications

Document A4148543

75.32 KiB

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