Nihilist cipher (English, noun)
expansion: Nihilist cipher (plural Nihilist ciphers)
Senses:
topics: computing
cryptography
engineering
mathematics
natural-sciences
physical-sciences
sciences
glosses: 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.
tags: historical
Forms:
form: Nihilist ciphers
tags: plural