Security, Symmetric Encryption, Cryptography, Encryption.
four input bytes, performs a byte-wise S-Box substitution, and adds a round coefficient RC to it. Round coefficient for each round is given Below. Again addition is modulo 2. RC[1] = x⁰ = (00000001), RC[2] = x¹ = (00000010), AES with 192-bit key has 12 rounds and, thus, 13 subkeys of 128 bit each.