5.2.1 Add Round Key
This step uses XOR addition to add the current round key to the current State array. The round key has the same size as the State, that is, 16 bytes or four words. This operation is implemented as a 16-step loop.
This step uses XOR addition to add the current round key to the current State array. The round key has the same size as the State, that is, 16 bytes or four words. This operation is implemented as a 16-step loop.
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