NSA
UNSOLVED PUZZLE
UNCLASSIFIEDib) i3)-P.L. 86-36An Unsolved Puzzle SolvedAs a professional cryptanalyst, I couldn'tresist the urge to attack the unknown cipherwhich appeared in Dr. Brent Morris's article,"Fraternal Cryptography" (Cryptologic Spec-trum, Summer 1978)...
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Internal Periodicals & Publications
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Internal Periodicals & Publications
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