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    Steve Bellovin (stevebellovin@mastodon.lawprofs.org)'s status on Thursday, 22-Feb-2024 01:52:54 JSTSteve BellovinSteve Bellovin
    in reply to
    • Charlie Stross

    @cstross Not just crimes, but also SIGINT. Worked example: in 2015, the NSA released William Friedman's papers. He retired in 1955 and died in 1969—but some of his papers were still withheld and others were redacted. And he filed a patent application in 1933 that for security reasons wasn't issued until 2003 (https://patents.google.com/patent/US6097812).

    In conversationThursday, 22-Feb-2024 01:52:54 JST from mastodon.lawprofs.orgpermalink

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      Cryptographic system
      The crytographic system automatically and continuously changes the cipher equivalents representing plaintext characters so as to prevent any periodicity in the relationship. The system has a series of juxtaposed, rotatable, connection changing mechanisms to provide a large number of alternative paths for the passage of an electric current corresponding to a message character. Further, the system has parts for the irregular and permutative displacements of the members of a set of circuit changing mechanisms to thwart cryptanalysis.
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