non-identity operation
A computing term for an operation that does not preserve identity; used in contexts such as cryptography, abstract algebra, or algorithm analysis. Rare outside technical literature.
This cryptographic protocol uses a non-identity operation to enhance key security.
The opposite term: an identity operation that leaves elements unchanged.
Compound of 非 (non-) + 一致 (identity, agreement) + 演算 (operation). A technical calque from English 'non-identity operation'.