摘要
介绍了DES加密算法的基本特点,证明了DES异或运算的一个重要性质,并且结合了混沌序列的优良特性,提出了一种基于混沌序列和DES的彩色图像加密算法和解密算法。该算法首先由Ulam-vonNeumann映射生成加密的密钥,然后对图像进行DES异或运算,得到加密图像。解密的过程就是需要得到与加密时相同的密钥,利用DES异或逆运算的性质得到解密图像。实验结果表明该算法能够得到令人满意的结果。
A new method for digital color image encryption based on chaotic sequence and DES in cryptography is presented. Combined with the Logistic mapping in non-linear dynamics system, an image encrypting and decrypting algorithm based on DES XOR operation is designed. Firstly, a natural chaotic sequence is created with the key. The image matrix is transformed with this chaotic sequence, using DES XOR operation for scrambling. Then an encrypted image is got. The decrypting operation is a reverse process ofencryption. The simulation indicates that the result is satisfying.
出处
《计算机工程与设计》
CSCD
北大核心
2006年第6期999-1001,1004,共4页
Computer Engineering and Design
