基于Zig-Zag扫描激光散斑与混沌相结合的彩色图像加密  

Color image encryption based on Zig-Zag scanning laser speckle and chaos

作　　者：尹娇 贺锋涛 王鸿喜 湛飞 王敏 

机构地区：[1]西安邮电大学电子工程学院

出　　处：《激光杂志》2018年第3期85-88,共4页Laser Journal

基　　金：国家自然科学基金资助项目(No.61201193)

摘　　要：为了保证彩色图像在传输过程中的安全性与可靠性,提出用Zig-Zag扫描法扫描随机激光散斑与Logistic混沌映射相结合进行彩色图像加密的新方法,同时构建了Zig-Zag扫描散斑混沌加密系统。系统先将原始彩图与Zig-Zag扫描后的激光散斑按位异或实现散斑加密,然后将加密后的图像与混沌序列按位异或进行混沌加密即可获得加密彩图,平均相邻像素相关性达0.0002。结果表明,本文方法具有较好的加密效果,可抵御统计分析攻击,较强的密钥敏感性,弱的相邻像素相关性。In order to ensure the security and reliability of the color image in the process of transmission, a new method of color image encryption based on random laser speckle image Zig-Zag scanning and Logistic chaotic mapping is proposed. Consequently, a new encryption system using speckle and chaos algorithm is constructed. In new system, the speckle encryption is realized by the performance of bitwise XOR operation on Zig-Zag scanning laser speckle and original color image firstly. Next, the chaotic encryption is achieved by the performance of bitwise XOR operation on speckle encrypted image and physically random laser speckle image. Its average correlation of adjacent pixels is 0. 0002. The results demonstrate that this encrypting method is quite effective in that it can not only resist statistical at- tacks better, but also has stronger key sensitivity and weaker correlation of adjacent pixels.

关 键 词：激光技术 彩图加密 激光散斑 Zig-Zag 混沌 

分 类 号：TN249[电子电信—物理电子学]