Modified AES

• Irreducible polynomial on GF(2⁸) and Final vector on Affine transformation is different from standard
• Use irreducible polynomial as x⁸+x⁶+x³+x²+1
• And final vector is 0x15
• But can be easily adapted by changing IRR_POLY and FINAL_VECTOR

1. Galois Field Operations & Inverse Manipulation

• Addition
• Multiplication

2. S-Box & Inverse S-Box Manipulation

• S-Box
• Inverse S-Box

3. Round Constant & Key Expansion

• Round constant
• Key Expansion
• R-Function

4. Encryption

• Substitute Bytes
• Shift Rows
• Mix Columns
• Add Round Key

5. Decryption

• Inverse Subsitute Bytes
• Inverse Shift Rows
• Inverse Mix Columns