5.3.1 AES Command

The AES Command can be used to encrypt and/or decrypt a 16-byte block of data utilizing an AES key. Note that the key is stored in a 16 Byte (128 bit) location with a given slot or within the first 16 bytes of TempKey. Multiple keys may be stored in a given slot and accessed in successive 16-byte boundaries, starting with 0-15 up to the size of the slot, but not exceeding four keys in any slot. For the ATECC608B-TNGTLS, an AES key may be stored in Slot 9. Slot 9 can accommodate up to four AES keys.

In addition to AES encryption and decryption, the AES command may be used to generate a Galois Field Multiply (GFM) in support of other cryptographic operations.