Master AES SubByte Step-by-Step: No S-Box Table Needed 🔐

In part 2, Extended Euclidean algorithm is used to find the GCD and then find multiplicative inverse using Irreducible Prime.

AES is a variant of the Rijndael block cipher developed by two Belgian cryptographers, Joan Daemen and Vincent Rijmen, who submitted a proposal to NIST during the AES selection process.Rijndael is a family of ciphers with different key and block sizes. For AES, NIST selected three members of the Rijndael family, each with a block size of 128 bits, but three different key lengths: 128, 192 and 256 bits.

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