Random Feistel scheme using BBS generator and DES algorithm

Abstract

In this world we can never trust that there will not be anyone who is not authorized, will not listen communication between two authorized parties. Cryptography is a technique for secure data communication. Encryption is the process of making the data in an unreadable form such that when an unauthorized user will read it, user would not find anything meaningful. Decryption is the process of making the unreadable data to readable form with some already known information. This dissertation presents random feistel network scheme. In DES, function in feistel structure is fixed already so at the place of fixed function a pseudorandom function is used. Strict avalanche criteria and bit independence criteria are measured for the purpose of performance analysis.