transposition

CONT: Le chiffrement est une forme de cryptographie qui consiste à transposer (transposition) les lettres d'un texte clair ou à leur substituer d'autres lettres (ou les deux).

CONT: Ciphering - a form of cryptography that involves transposing the original letters of a message, substituting them with other letters, or transposing and substituting in combination - lies somewhere between these two extremes: a key must be used to decrypt the message but it is often possible to determine what the key is by examining the enciphered message.