基于混沌和AES算法的数字图书馆数据加密方案

A Scheme of Data and Encryption Algorithm Based on Chaos and AES for Digital Library

提出的加密方案是AES算法在数字图书馆中的应用和改进。改进的新算法采用Logistic映射初值作为种子密钥生成混沌序列,对该序列进行域值量化得到二进制密钥流,对其分组作为AES算法的初始密钥,实现了一次一密;通过用动态密码对明文修补,实现密文与明文的长度相同;通过减少加密轮次,降低其时间复杂度,从而使其在数字图书馆数据加密系统中的应用可行。计算机仿真结果验证了该算法的正确性以及密文对密钥的高度敏感性。

The encryption means this paper puts forward is an improvement and application of AES for digital library.By using initial values of logistic map as the cipherkey seeds to create chaotic sequences and then carrying on quantification with its proper region value,the binary system cipherkey streams can be obtained.The initial cipherkey of AES can be produced by dividing the binary streams into groups,and one-time-pad is realized with the algorithm.The improved algorithm is applicable in the digital library through length equalization by patching on the plain text with dynamic cipher,and time complexity reduction by degrading the number of encrypting rounds.The results of simulation verify the correctness of the algorithm and the high sensitivity of cryptograph to cipherkey.