【摘要】 基于低维混沌系统的图像加密算法存在密钥空间小、安全性不高等问题。为此,在三维Cai混沌系统的基础上,构造出一个四维忆阻超混沌系统,同时,基于该系统提出一种新的医学图像加密算法。安全性分析结果表明,算法密钥空间大,对密钥非常敏感,能够抵抗蛮力攻击、已知(选择)明文攻击和差分攻击。更多还原

【Abstract】 The image encryption algorithm based on low dimensional chaotic system has the problems of the key space small and the security not high. Therefore, on the basis of three dimensional Cai system, a four-dimensional memristive hyperchaotic system was constructed, and further a new medical image encryption algorithm is proposed. The security analysis shows that the algorithm has a large key space, is very sensitive to keys, and can resist the brute force attack, known plaintext attack, chosen plaintext attack and differential cryptanalysis attack.更多还原