polyalphabetic

Adjective

Meaning

polyalphabetic (not comparable)

Describing a substitution cipher in which plaintext letters in different positions are enciphered using different substitution alphabets.

Examples

Enigma's security came from using several rotors in series (usually three or four) and the regular stepping movement of the rotors, thus implementing a polyalphabetic substitution cipher. Source: Internet

Modern stream ciphers can also be seen, from a sufficiently abstract perspective, to be a form of polyalphabetic cipher in which all the effort has gone into making the keystream as long and unpredictable as possible. Source: Internet

It produced a polyalphabetic substitution cipher, but unlike Enigma, was not a rotor machine, being built around electrical stepping switches. Source: Internet

In a polyalphabetic cipher, multiple cipher alphabets are used. Source: Internet

Simple ciphers were replaced by polyalphabetic substitution ciphers (such as the Vigenère ) which changed the substitution alphabet for every letter. Source: Internet

The method of filling the tableau, and of choosing which alphabet to use next, defines the particular polyalphabetic cipher. Source: Internet

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