基于忆容器混沌电路设计及图像加密算法

The design of a chaotic circuit based on memcapacitor and image encryption algorithm

研究设计了一类基于忆容器的混沌电路,功率谱、Lyapunov指数的计算结果和系统运动轨迹的仿真结果验证了该系统的混沌性。鉴于传统图像加密技术和低维混沌加密技术存在安全性不高、密钥空间相对较小的局限性,本文提出一种基于该混沌系统的图像加密方法,并对其进行了数值仿真与性能分析。安全性分析和测试结果表明,该算法对密钥非常敏感,相邻像素满足零相关性,具有较强的安全性和良好的加密效果。

A chaotic circuit based on memcapacitor is proposed in this paper, the chaotic nature of the system is validated by the calculations of its power spectrum and the Lyaptmov exponent and the simulation results of system trajectory. In view of the security of conventional image encryption technology and low-dimensional chaotic encryption technology is not high and the secret key space is relatively small, the image encryption method based on chaotic system is proposed in this paper. Furthermore, its numerical simulation and performance analysis is proceed. Security analysis and test results show that the algorithm is very sensitive to the secret key. Meanwhile, adjacent pixels satisfy zero correlation and the algorithm has strong security and good encryption effect.