摘要
讨论了一种基于Lorenz混沌动力系统的三维彩色图像加密的算法。该算法首先对Lorenz系统输出的实值混沌序列进行预处理,然后根据序列随机修改图像中每一个像素点的RGB值,并对修改后的图像进行像素置乱。仿真与讨论结果表明,该算法密钥空间大,混沌信号的产生极其敏感地依赖于密钥,具有较好的加密效果和加密效率,并对统计分析具有较好的安全性。
The paper proposed an image encryption algorithm based on Lorenz system. Firstly , Lorenz chaotic sequences are preprocessed, Then according to discrete sequences, the RGB value of pixel is modified randomly and scramble the modified image. The simulation and analysis results show that the chaotic signals are greatly sensitive to the keys and the algorithm has a large space of keys to acquire good encryption effects and efficiency, and a better security performance to statistical analysis.
出处
《电子测量技术》
2008年第11期34-36,共3页
Electronic Measurement Technology
基金
河北省教育厅二○○七科学基金(2007493)
