基于蔡氏电路和DES的图像加密算法

An Image Encryption Scheme of DES Algorithm and Chua’s Circuit

针对Data Encryption Standard(DES,数据加密标准)算法所存在的不足和混沌序列的特点,提出了一种新的基于蔡氏电路和DES的图像加密算法。该算法将蔡氏电路所生成的混沌序列与DES算法相结合,对加密时所用的初始密钥和16轮迭代运算过程进行了改进。把混沌加密技术嵌入到迭代运算过程中,理论分析和实验仿真结果表明,与DES算法相比,该算法扩展了初始密钥选择空间,有效地提高了算法安全性能和抵抗攻击能力。新算法更利于图像信息传递,同时更好地保证了信息的安全性和保密性。

In view of Chua＇s circuit＇s characters and the deficient in DES algorithm, the paper presents a new image encryption scheme of DES algorithm and Chua＇s circuit. The scheme combines chaos sequence with the DES algorithm to improve on the initial keys and sixteen times iterated operations, put chaos encryption into iteration . Theory analysis and simulation results show that the presented scheme is able to extend initial key space, improve the ability of the algorithm＇s security and anti-attack effectively, it is more propitious to transmit image information, insure image information＇s security and confidentiality.