nihilist cipher

Questions

What does nihilist cipher mean?

A symmetric cipher in which a Polybius square using a mixed alphabet is used to convert both the plain text and a keyword to a series of two-digit numbers, which are then summed in the normal way to get the ciphertext, with the key numbers repeated as required; (by extension) any of several improved algorithms based on this.

Where does nihilist cipher come from?

The cipher was originally used by Russian Nihilists in the 1880s to organise terrorism against the tsarist regime.

How to pronounce nihilist cipher

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