Breaking a novel image encryption scheme based on improved hyperchaotic sequences
Breaking a novel image encryption scheme based on improved hyperchaotic sequences
复制标题
突破基于改进超混沌序列的新颖图像加密方案
DOI：
10.1007/s11071-013-0924-6
复制
发表时间：
2013-08-01
影响因子：
5.6
通讯作者：
Chen, Michael Z. Q.
中科院分区：
文献类型：
--
作者：
Li, Chengqing;Liu, Yuansheng;Chen, Michael Z. Q.
近年来，提出了一种新的基于改进超混沌序列的图像加密方案。利用超混沌系统产生的伪随机数序列来确定两个加密函数：位异或（XOR）运算和模加运算。据报道，该方案可以被一些选择的明文图像和相应的密码图像对破解。本文重新评估了该加密方案的安全性，发现只需一张已知的明文图像就可以破解该加密方案。已知明文攻击的性能，在成功概率和计算量方面，当两个已知的纯图像可用时变得更好。此外，还报告了加密结果对密钥和明文图像的变化不敏感的安全缺陷。
Recently, a novel image encryption scheme based on improved hyperchaotic sequences was proposed. A pseudo-random number sequence, generated by a hyper-chaos system, is used to determine two involved encryption functions, bitwise exclusive or (XOR) operation and modulo addition. It was reported that the scheme can be broken with some pairs of chosen plain-images and the corresponding cipher-images. This paper re-evaluates the security of the encryption scheme and finds that the encryption scheme can be broken with only one known plain-image. The performance of the known-plaintext attack, in terms of success probability and computation load, become even much better when two known plain-images are available. In addition, security defects on insensitivity of the encryption result with respect to changes of secret key and plain-image are also reported.