Tag
cbc-mac
- Nov 2, 2024 CBC-MAC Ends at the Last Block, and That Is the Problem Chaining a block cipher over a message authenticates only the final block, so variable-length messages invite splicing attacks; CMAC adds two derived subkeys to close the hole. cryptography
- Feb 17, 2024 CCM: Combining a MAC and a Counter Inside One Mode How CCM derives a CTR nonce, a CBC-MAC IV, and a length-encoded authentication header to authenticate before encrypting, and what the two passes and the 16-byte block size cost. cryptography