Enhancing Security and Speed of RC4

Abstract

Wireless communication security is a critical factor for secure communication among large scale of wireless networks. A limited resource constraint, such as power and memory size presents a significant challenge to implement existing cryptographic algorithms. One of the most important symmetric cryptographic algorithms is Rivest Cipher 4 (RC4) stream cipherthatis utilized in many real-time security applications. However, the RC4 cipher shows some weaknesses, including a correlation problem between the public known outputs of the internal state. In this paper, we propose RC4 stream cipher with a random initial state (RRC4) to solve the weak keys problem of the RC4 using a random initialization of internal state S. We also propose RC4 stream cipher with two state tables (RC4-2S) to solve the correlation problem between the public known outputs of the internal state using permutation between state1 (S 1 ) and state 2 (S 2 ) while requiring less time than RC4. Finally, we propose RC4 stream cipher with two state tables togenerate four keys (RC4-2S + ) in each cycle which further enhances randomness overRC4-2S and RRC4.

Implementasi Algoritma Rc4 Pada Sistem Informasi Koperasi Virtual Bawaslu Provinsi Sulawesi Tengah Virtual Bawaslu

“…Namun, penelitian ini menggunakan RC4 karena kecepatan dan kesederhanaannya, sehingga mudah untuk dikembangkan dan diimplementasikan secara efisien. RC4 dikenal dengan kecepatan pemrosesan dan keamanannya, algoritma ini dapat digunakan untuk mengamankan data (An-Nissa et al, 2022;Hammood et al, 2015;Karo-Karo & Zarlis, 2020).…”