一种基于新复合混沌系统的图像加密算法

An Image Encrypting Algorithm Based on a New Compound Chaotic System

提出了一种由Logistic映射和正弦映射组合而成的复合混沌系统.与原混沌系统相比,复合混沌系统产生的混沌序列性能更好,且产生混沌特性的参数范围更大.为了验证新复合系统在图像加密中的应用效果,提出了一种新的图像加密方案,该方案证明了新系统在加密应用中的有效性.理论分析和仿真实验表明,该加密方案具有良好的密码学性能,算法能够抵抗蛮力攻击、统计分析攻击、差分攻击、选择明(密)文攻击.

A type of compound chaotic system which is composed of Logistic map and sine map is proposed in this paper. Compared with the original chaotic system, the chaotic sequences generated by the composite chaotic system have better performance, and the parameter range of the chaotic properties is even larger. In order to verify the application effect of the new composite system in image encryption, a new image encryption scheme is raised. The effectiveness of new system in image encryption application is verified in this scheme. Theoretical analysis and simulation experiment show that the very encryption scheme has good cryptographic properties, and the algorithm can resist brute force attack, statistical analysis attack, differential attack and chosen plaintext/ciphertext attack.