Comparing Cryptographic Algorithms in Scalable Feistel Networks

Abstract

Scalability of symmetric cipher is still not as natural as for public-key cryptosystems. Most of the current block ciphers do not support freely variable block and key lengths. A generalization of the concepts of Feistel Networks (FN), known as Extended Feistel Network (EFN), that splits the input blocks into n>2 sub-blocks. EFN consists of a series of rounds whereby at least one sub-block is subjected to an F function. The aim of this system compares the performance of scalable Extended Feistel Network by using a variety of file sizes. This is done by compare RC6 that uses EFN-Type II and MARS that uses EFN-Type III encryption algorithms.