Date Added: Nov 2012
Advanced Encryption Standard (AES), a Federal Information Processing Standard (FIPS), and categorized as Computer Security Standard. The AES algorithm is a block cipher that can encrypt and decrypt digital information. The AES algorithm is capable of using cryptographic keys of 128, 192, and 256 bits. The Rijndael cipher has been selected as the official Advanced Encryption Standard (AES) and it is well suited for hardware. This paper talks of AES 128 bit block and 128 bit cipher key and is implemented on Spartan 3 FPGA using VHDL as the programing language. Here a new FPGA-based implementation scheme of the AES-128 (Advanced Encryption Standard, with 128-bit key) encryption and decryption algorithm is proposed in this paper.