polyalphabetic substitution

[ pol-ee-al-fuh-bet-ik suhb-sti-too-shuhn, ‐tyoo-shuhn, pol-ee- ]

/ ˈpɒl iˌæl fəˈbɛt ɪk ˌsʌb stɪˈtu ʃən, ‐ˈtyu ʃən, ˌpɒl i- /

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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.

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CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?

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Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Compare monoalphabetic substitution.

Origin of polyalphabetic substitution

1935–40; poly- + alphabetic

Words nearby polyalphabetic substitution

polyacrylonitrile, polyadelphous, polyadenylic acid, polyadic, polyalcohol, polyalphabetic substitution, polyamide, polyamine, polyamorous, polyamory, polyandric