基于一类离散混沌系统的图像加密技术

Image Encryption Technology Based on a Class of Discrete Chaos System

针对一维离散混沌加密系统密钥空间小、安全性能差等缺点,提出了一种基于连续混沌系统通过最小二乘法构造离散混沌系统的方法,改进了加(解)密实数混沌序列映射为加(解)密因子序列的位序列方法。实验研究证明,论文提出的离散混沌系统数字图像加密技术既保留了一维离散混沌系统加解密效率高的特点又扩展了密钥空间进一步提高了加密系统抗破译的能力。

In allusion to smaller key space and weak security of1D discrete chaotic image encryption,it puts forward that constructing discrete chaos system base on continues chaos system by least-square method.It improves that bit se-quence method that maps from encrypting /decrypting real chaotic sequence to encrypting /decrypting gene sequence.Ex-periment research demonstrates that digital image encryption technology base on discrete chaos system in this paper,not only possesses of efficiency of1D discrete chaotic image encryption but also tones up ability to deciphering.