Date Added: Mar 2011
The main aim of this paper is to provide stronger security for communication over the Internet by enhancing the strength of the AES algorithm. Rijndael's algorithm was selected as the Advanced Encryption Standard. The AES algorithm was believed to provide much more security without any limitations. But, recently some breaking methods on the AES have been found by cryptanalysts. In AES algorithm, the number of rounds involved in the encryption and decryption depends on the length of the key and the number of block columns. So, the number of rounds is increased to improve the strength of the AES.