含忆阻器混沌电路系统和量子随机行走的图像加密算法

Image Encryption Algorithm with Memristor Chaotic Circuit System and Quantum Random Walk

以含忆阻元件的电路系统为研究对象,将混沌电路系统和量子随机行走方法相结合,提出了一种基于混沌系统的图像加密方法。建立了含记忆电容(电感)和记忆电阻的简单压控(荷控)电路系统。以压控并联电路为例计算得到7种不同的吸引子类型,并作为图像加密的核心加密方式。量子随机行走作为一种有效的置乱手段参与了加密算法的各个部分。结果表明:经过本文算法得到的密文三通道信息熵都在7.999达到了峰值,像素相关性系数均接近于0,三通道的加密质量EQ值也均在1024附近。

An image encryption method based on chaotic system was proposed by combining chaotic circuit system with quantum random walk method.A simple voltage control(charge control)circuit system containing memory capacitance(inductance)and memory resistance was established.Taking voltage control parallel circuit as an example,seven different attractor types were calculated which were the core encryption method of image encryption.Quantum random walk participated in each part of the encryption algorithm as an effective scrambling method.The results show that the information entropy of the ciphertext channel obtained by the algorithm in this paper reaches to peak value at 7.999,the pixel correlation coefficient is close to 0,and the encryption quality EQ value of the ciphertext channel is also near 1024.