In the history of cryptography, the Nihilist cipher is a manually operated symmetric encryption cipher originally used by Russian Nihilists in the 1880s to organize terrorism against the tsarist regime. The term is sometimes extended to several improved algorithms used much later for communication by the First Chief Directorate with its spies.
Read more about Nihilist Cipher: Description, Nihilist Cryptanalysis, Later Variants or Derivatives, See Also
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