【摘要】 在对现有的两类图像加密方法安全性分析的基础上,提出了一种改进的图像加密方法.这种方法基于传统混沌加密算法,利用混沌系统对初始条件的敏感依赖性,在图像加密过程中引入一个辅助密钥,可有效抵抗已知明文攻击.分析及计算机仿真结果表明,该加密方法具有良好的加密效果,运算量小,易于硬件实现.更多还原

【Abstract】 The security of two kinds of image encryption methods is analyzed, and an improved image encryption algorithm is proposed. Using the high sensitivity to the initial value of the chaos system, an assistant key is imported based on conventional chaotic encryption algorithm. The analyses and the computer simulation results show that the proposed algorithm can effectively resist known-plaintext attack and be easily realized with hardware.更多还原