Date Added: Jun 2011
Chaotic encryption schemes are believed to provide greater level of security than conventional ciphers. In this paper, a chaotic stream cipher is first constructed and then its hardware implementation details over Xilinx Virtex- 6 FPGA are provided. Logistic map is the simplest chaotic system and has high potential to be used to design a stream cipher for real-time embedded systems. Its simple construct and non-linear dynamics makes it a common choice for such applications. In this paper, the authors present a Modified Logistic Map (MLM) which improves the performance of Logistic Map in terms of higher Lyapunov exponent and uniformity of bifurcation map.