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Thread for Exchanging Info about Ciphers

Tinker tailor tourist spy › Forums › Bureau of Security and Signals Intelligence Forum › Thread for Exchanging Info about Ciphers

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  • 5th November 2020 at 4:09 pm #51512
    Madness
    Participant

    I am starting this thread for those of us interested in learning about ciphers, so that we
    can exchange information. Please ask your questions, and give answers to your colleagues.

    My first question: Do any of you know about Jack Levine’s trigram cipher? What I know so far is that it is
    an extension of the Playfair that encrypts three letters at a time, and that it maybe uses five 5×5 grids.
    There was an article in The Cryptogram in 1961, but I don’t have access.

    8th November 2020 at 12:19 pm #51628
    Madness
    Participant

    Harry, could you please change the title of this thread to
    “Thread for Exchanging Info about Ciphers”?
    I think it may attract more interest.
    Thank you.

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