基于混沌序列的图像加密算法

Image encryption algorithm based on chaotic sequence

加密是保证机密信息安全的重要手段。设计了一种基于混沌序列的加密算法:以非线性动力系统的Logistic映射为模型,采用两个初值不同的混沌序列,由它们分别产生二值序列的奇数位与偶数位,再与数字图像进行异或操作,实现了对图像的快速加密。实验证明该算法实现简单,安全性高,有较强的抗攻击能力,具有良好的加密效果。

Encryption is a kind of important method to guarantee the security of the secret information. Chaotic sequence is easy to generate, strong sensitivity to initial conditions can be completely reproducible and other characteristics, based on the above characteristics, a new image encryption algorithm was given. Two different logistic mapping were used to generate the binary sequence＇s odd-bit and dual-bit, then the digital image was quickly encrypted. Simulation experiments show that the improved algorithm is simple, high security, and it also have stronger anti-attack capability and good effect of encryption.