The AES-GCM core has a 32-bit word-based data interface with support for a 256-bit key. The AES-GCM mode supports encryption and decryption, multiple key sources, and built-in message integrity check.
Note: The AES engine operates on a 32-bit boundary.
The AES-GCM-256 core allows for the following key sources.
•eFUSE device key
•Operation key (OPKEY)
•Key update register (KUP)
•Family key (for obfuscated key storage)
•PUF key-encryption-key (KEK) (for black key storage)