Chi-Squared Test Analysis on Hybrid Crypto System

Abstract

Nowadays the internet has reached each and every aspect of our day-to-day life. The idea of cryptography is to provide security. It is an encryption technique used for network security when different networks are interconnected and become vulnerable to attacks and intrusions. Different algorithms like DES, 3-DES, Modified DES, RSA, and Modified RSA algorithms for encryption have been reported. In this paper, a hybrid cryptosystem, which is the combination of the traditional DES & RSA, has been discussed. The performance analysis, like mainly chi-squared test and then frequency analysis of the hybrid algorithm has been dealt here clearly to show the novelty of the combined DES and RSA work. A comparative study has been performed with the traditional DES & RSA technique. The chi-squared methodology is a statistical way of evaluating the quality of ciphertext. If the ciphertext needs to be strong, then A high value of chi-squared is desired.