polyalphabetic
Related Words
monoalphabeticciphercryptographyencryptiondecryptioncryptanalysiskeyplaintextciphertextalphabetsubstitutionpermutationtranspositionfrequencyanalysisperiodshiftcodeencodingdecodingalgorithmsecurityprivacysecretmessagesymbolcharacterstringmatrixmonogramdigraphtrigraphstream cipherblock ciphersymmetricasymmetricmoduloarithmeticscytalesteganographyhashchecksumentropyrandomnesspatterninterceptbrute forcecryptogramcipher text