物理学报2012，Vol.61Issue(12)：76-87,12.
对一类超混沌图像加密算法的密码分析与改进
Cryptanalysis and improvement of a class of hyperchaos based image encryption algorithms
摘要
Abstract
The security of a class of hyperchaotic image encryption algorithms is analysed. The results show that the shuffling process can be separated from the confusion process, and the formulas of encryption are simple, which makes the cipbertext cannot resist the attacks from chosen plaintext and ciphertext. Then we propose an improved and enhanced algorithm based on hyperchaos. The improved algorithm includes two rounds of encryption operation. The theoretical analyses and the experimental results indicate that the improved algorithm can overcome these flaws and has better cryptographic performances in resisting differential attacks and speed of encryption.关键词
超混沌/图像加密/选择明文攻击/选择密文攻击Key words
hyperchaos/image encryption/chosen plaintext attack/chosen ciphertext attack分类
信息技术与安全科学引用本文复制引用
朱从旭,孙克辉..对一类超混沌图像加密算法的密码分析与改进[J].物理学报,2012,61(12):76-87,12.基金项目
国家自然科学基金（批准号：61073187,61161006）,湖南省自然科学基金（批准号：10JJ6093）和广东省自然科学基金（批准号：$2011010001581）资助的课题. （）
