The GHASH engine is suitable for generating Galois hashes for message authentication.
AES in Galois counter mode (AES-GCM) is an authenticated encryption with additional data (AEAD) block cipher mode of operation which provide confidentiality, integrity and authentication of data.
The CRYPTOCELL subsystem is able to perform single-pass AES in galois counter mode (GCM), where the AES engine is used for data confidentiality and the GHASH engine provide data integrity and authentication.
Note: To ensure proper operation, the write-only key registers of the GHASH engine must be written in ascending order,
starting with: