An Improved Chaos-based Image Encryption Algorithm
Chaos-based image encryption algorithms are widely investigated recently. Concrete implementation of theses conventional chaos-based algorithms usually arise some security problems because finite computation precision can not guarantee the ideal statistical properties of a chaos system. This paper proposes a couple chaotic systems based image encryption algorithm, which enhances the security under precision restricted condition through enlarging the key space and strengthening the anti reverse iteration ability. The balance and correlation properties of the quantified chaotic binary sequence are analyzed. The sequence is proved to be a binary Bernoulli sequence and the side lobes of auto and cross correlation are proved to obey normal distribution N(0, 1/N). Theoretical analysis and experimental results show that the algorithm proposed in this paper is more secure than conventional single chaos system based algorithms.
image encryption chaos key space, position permutation, greyscale substitution
CAO Yingyu FU Chong ZHANG Zhenchuan
School of Information Science and Engineering Northeastern University Shenyang 110004, China
国际会议
武汉
英文
675-679
2007-07-25（万方平台首次上网日期，不代表论文的发表时间）