AES encryption circuitry with CCM

摘要

The invention concerns circuitry for encrypting at least a part of an input data (Bi) flow and generating a tag based on said input data flow with a same ciphering algorithm and a same key comprising: a first ciphering branch arranged to encrypt said at least part of said input data; a second ciphering branch arranged to generate said tag; and a single key schedule unit arranged to receive said key, to generate at least one sub-key based on said key and to provide said at least one sub-key to said first and second ciphering branches.