Cryptography and Network Security Principles and Practice, 8th Edition - Pearson

APPENDIX D

Simplified AES

D.1 Overview

D.2 S-AES Encryption and Decryption

Add Key

Nibble Substitution

Shift Row

Mix Column

D.3 Key Expansion

D.4 The S-Box

D.5 S-AES Structure

ANNEX D.1 Arithmetic in GF(2⁴)

ANNEX D.2 The Mix Column Function

 

Simplified AES (S-AES) was developed by Professor Edward Schaefer of Santa Clara University and several of his students [MUSA03]. It is an educational rather than a secure encryption algorithm. It has similar properties and structure to AES with much smaller parameters. The reader might find it useful to work through an example by hand while following the discussion in this appendix. A good grasp of S-AES will make it easier for the student to appreciate the structure and workings of AES.

D.1 OVERVIEW ...