Chi-Squared Test Analysis on Hybrid Cryptosystem

Nowadays, the internet has reached 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 and RSA has been discussed. The performance analysis, such as the chi-squared test and then frequency analysis of the hybrid algorithm have been discussed in this article to show the novelty of the combined DES and RSA work, and a comparative study has been performed with the traditional DES and RSA techniques. 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.