noun
transposition cipher
A cryptographic method that rearranges the order of characters without changing the characters themselves. Technical term used in information security.
転置式暗号は、平文の文字の順序を入れ替えることで暗号化を行う。
A transposition cipher encrypts by rearranging the order of the plaintext characters.
Substitution cipher, which replaces characters with others, unlike transposition which only rearranges them.
Compound of 転置 (transposition) + 式 (style/type) + 暗号 (cipher). The exact historical derivation is uncertain; the term is a modern technical coinage.