Design of High Performance S-Box for AES 256 Bit using Galois Field (28)

Abstract

The Advanced Encryption Standard (AES) is considered to be the strongest encryption technique in cryptography. Advanced Encryption Standard (AES) is a symmetric key block cipher which will encrypt as well as decrypt the data block. The pre-computed values stored in a ROM based lookup table. In this implementation, all 256 values are stored in a ROM such implementation is expensive in terms of hardware. A more refined way of implementing the Substitution Box (S-Box) by using Composite field method through combinational logic.  This S-Box has the advantage of having small area occupancy. Hence it delivers high throughput optimizes the delay and reduces the area. The 256-bit Advanced Encryption Standard (AES) of fully Pipelined AES with Compact S-Box is simulated and synthesized by Xilinx 14.7v tool.

Keywords: VLSI, AES, Encryption, Decryption.