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Define Poly-alphabetic cipher.
written 7.4 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 4.2 years ago
cryptography and system security
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written 7.4 years ago by gravatar for teamques10 teamques10 ★ 65k
  • A cipher which replaces one symbol with another is called as substitution cipher.
  • In poly-alphabetic substitution, each occurrence of a character may have a different substitute.
  • The relationship between a character in the plaintext to a character in the ciphertext is one-to-many
  • E.g. the letter “a” could initially be substituted …

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