polyalphabetic
Từ liên quan
monoalphabeticciphercryptographyencryptiondecryptioncryptanalysiskeyplaintextciphertextalphabetsubstitutionpermutationtranspositionfrequencyanalysisperiodshiftcodeencodingdecodingalgorithmsecurityprivacysecretmessagesymbolcharacterstringmatrixmonogramdigraphtrigraphstream cipherblock ciphersymmetricasymmetricmoduloarithmeticscytalesteganographyhashchecksumentropyrandomnesspatterninterceptbrute forcecryptogramcipher text