Cryptologic Bytes

"On This Date in History" Calendar

1865: First US patent for cipher device to Edwin H. Hawley

Monday, July 11, 2022

On 11 July 1865, the first US patent was granted for a cipher device to Signal Corps Sergeant Edwin H. Hawley, for multiple alphabetic device which was a fan-like set of 26 wooden tablets, each with a different ciphertext alphabet on it, designed for use with a keyword. Info per David Kahn's book, "The Codebreakers."

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