polyalphabetic substitution
[ pol-ee-al-fuh-bet-ik, pol-ee- ]
/ ˈpɒl iˌæl fəˈbɛt ɪk, ˌpɒl i- /
noun Cryptography.
a system of substitution that mixes together a number of cipher alphabets in a cryptogram so that each plaintext letter is represented by a cipher that repeatedly changes.
Compare
monoalphabetic substitution.
Origin of polyalphabetic substitution
1935–40;
poly- +
alphabetic
Words nearby polyalphabetic substitution
polyadenitis,
polyadenopathy,
polyadenylic acid,
polyadic,
polyalcohol,
polyalphabetic substitution,
polyamide,
polyamine,
polyamorous,
polyamory,
polyandric