| 1. (Reversible) transformation of data by a cryptographic algorithm to produce ciphertext, i.e., to hide the information content of the data.
(Source: ISO/IEC 18033-1)
2. Cryptographic transformation of data (called “plaintext”) into a form (called “ciphertext”) that conceals the data’s original meaning to prevent it from being known or used. If the transformation is reversible, the corresponding reversal process is called “decryption”, which is a transformation that restores encrypted data to its original state.
(Source: RFC 2828) |