An Improvement of RC4 Cipher Using Vigenere Cipher

Details An Improvement of RC4 Cipher Using Vigenere Cipher An Improvement of RC4 Cipher Using Vigenere Cipher

2011-11-23

arxiv.org/abs/1111.5641v1

International Journal of Computational Intelligence and Information Security Vo. 1 No. 3, May 2010

Computer Science

Cryptography and Security

Scientific paper

This paper develops a new algorithm to improve the security of RC4. Given that RC4 cipher is widely used in the wireless communication and has some weaknesses in the security of RC4 cipher, our idea is based on the combination of the RC4 and the poly alphabetic cipher Vigen\`ere to give a new and more secure algorithm which we called VRC4. In this technique the plain text is encrypted using the classic RC4 cipher then re-encrypt the resulted cipher text using Vigen\`ere cipher to be a more secure cipher text. For simplicity, we have implemented our new algorithm in Java Script taking into consideration two factors: improvement of the security and the time complexity. To show the performance of the new algorithm, we have used the well known network cracking software KisMac.

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