Advanced Encryption Standard, widely used for symmetric encryption. AES is a block cipher. Each piece of data is processed and encrypted as a fixed block of 128 bits (16 bytes). This is encrypted with a [[Data Encryption Key]] of one of the following sizes: 128-bit, 192-bit, 256-bit. This key can be derived from another key using [[HKDF]]. ## Modes This section is woefully incomplete. * [[AES-GCM]]