Novel Hardware Implementation of Modified RC4 Stream Cipher for Wireless Network Security
In this paper, the authors present novel hardware implementation of modified RC4 stream cipher for wireless network security. The Modified RC4 algorithm proposes two changes in conventional RC4 stream cipher algorithm, one in Key Scheduling Algorithm (KSA) stage and other in Pseudo Random Generation Algorithm (PRGA) stage. This modification in KSA removed many weakness and produces random states, so that it will hard to identify any non-uniformity in the permutation after KSA. The other modification in PRGA has destroyed relation between internal states of S-boxes, which is base of many attacks on RC4.