31/12/2019

A Polyphonic Cipher of a Spanish Ambassador?

I collect historical examples (mostly Italian) of polyphonic substitution cipher in "A Polyphonic Substitution Cipher of the Catholic League (1592-1593)". Now, I noticed a specimen in Devos (1950), possibly related to Spanish ambassador de Spes, and added a reference to it.
Related changes have been made in
"Spanish Ciphers during the Reign of Philip II" and
"Polyphonic Substitution in Italian Numerical Ciphers".

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1 comment:

  1. cryptiana03/01/2020, 06:40

    I made two further additions from Friedrich Bauer's book: SA Cipher (1918) of the British Admiralty and one solved by Babbage in 1853.

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