2b7e1516 28aed2a6 Abf71588 09cf4f3cf3c

2b7e1516 28aed2a6 Abf71588 09cf4f3cf3c. To avoid using the same key every round, we derive new keys (called round keys) from the original one. It is, succinctly, hkdf but with hmac [ rfc2104] replaced by cmac [ rfc4493 ].

Advanced encryption standard (aes) is a specification for the encryption of electronic data established by the u.s. K 2b7e1516 28aed2a6 abf71588 09cf4f3c.