一种新型级联混沌的图像加密方案

用蔡氏混沌系统产生的三维混沌序列为初始值去启动Logistic映射得到一新的序列，并从密码学的角度对此序列进行分析。研究表明该序列具有良好的随机性，适于做扩频序列。最后应用此序列进行了图像加密解密的研究。仿真结果和安全分析表明该序列克服了单混沌系统潜在的动力学系统攻击的可能，扩大了密钥空间，具有较高的保密性能，可有效地抵御采用相空间重构技术的攻击。

Scheme of Image Encryption Based on New Cascading Chaos

A new sequence is yielded from logistic map, which is initialized by three dimensions chaotic sequences of Chua's chaotic system. Then the new sequence is analyzed from the view of cryptology. The result proves that it has excellent randomicity and is adopted as spreading spectrum sequence. In the end, image encryption and decryption with the new sequence are studied. Simulation and security analysis show that the sequence overcomes latent attack in single chaotic system and enlarges the key space. It can withstand the attack by phase space reconstitution effectively.