AES (Advanced Encryption Standard) is a block cipher developed by Joan Daemen and Vincent Rijmen. AES is a variant of Rijndael which has a fixed block size of 128 bits, and a key size of 128, 192 or 256 bits. AES has 10 rounds for 128-bit keys, 12 rounds for 192-bit keys, and 14 rounds for 256-bit keys.

SIV (Synthetic Initialization Vector) is a block cipher mode that provides nonce-based authenticated encryption and deterministic, nonce-less key wrapping. SIV can replace any specification that uses the Advanced Encryption Standard (AES) Key Wrap Algorithm (RFC3394) or Triple-DES and RC2 Key Wrapping (RFC3217).