Comparison of RC6, modified RC6 & enhancement of RC6

Abstract

In this paper we are going to compare the symmetric Block cipher RC6 with the two more versions of RC6. Modified RC6 and Enhanced RC6 provide some improvements of RC6, which is latest version of AES. The basic difference between the three algorithms is that RC6 works on block size of 128 bits, Enhancement of RC6 (RC6e) works on block size of 256 bits and Modified RC6 (MRC6) works on block size of 512 bits. The basic operations used in the three algorithms are same. All the three algorithms consist of three parts encryption, decryption and key expansion. In this paper we are going to compare these algorithms on the basis of encryption and decryption time on the basis of different file size and file types.