摘要
为保证虹膜信息在网络传输中的安全,提出Arnold变换与OCML混沌系统相结合,针对虹膜图像的复合混沌加密系统对虹膜信息进行加密.首先,利用Arnold变换置乱并混淆虹膜图像,然后通过镜像算法解决Arnold变换中零点不变性问题,最后对置乱后的虹膜图像通过OCML混沌系统进行加密.实验表明,该算法密钥空间大,统计特性好,密钥敏感性强,加密速度快,平均加密时间70 ms.
To ensure the iris information transmitted in network safely, a compound chaos encryption system（CCES） is proposed, which is the combination of Arnold transform and OCML, to encrypt iris image. Using Arnold transform is to shuf- fle and confuse iris image, and then by mirrored method to solve the question of zero position invariable. Finally, the shuffled iris image is encrypted by OCML chaos system. The experiment shows that this algorithm has such advantages： larger key space, better key sensitivity and statistical characteristics, faster encryption speed. The average encryption time is about 70ms.
出处
《河南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第3期68-70,共3页
Journal of Henan Normal University(Natural Science Edition)
基金
国家自然科学基金(60605009)
