This Recommendation specifies the Galois/Counter Mode (GCM), an algorithm for authenticated encryption with associated data, and its specialization, GMAC, for generating a message authentication code (MAC) on data that is not encrypted. GCM and GMAC are modes of operation for an underlying approved symmetric key block cipher.
Citation: Special Publication (NIST SP) - 800-38D
NIST Pub Series: Special Publication (NIST SP)
Pub Type: NIST Pubs
authenticated encryption, authentication, block cipher, confidentiality, cryptography, encryption, information security, mode of operation