Cryptanalysis of an image encryption scheme based on a compound chaotic sequence
Cryptanalysis of an image encryption scheme based on a compound chaotic sequence
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DOI：
10.1016/j.imavis.2008.09.004
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发表时间：
2009-07-02
影响因子：
4.7
通讯作者：
Halang, Wolfgang A.
中科院分区：
文献类型：
--
作者：
Li, Chengqing;Li, Shujun;Halang, Wolfgang A.
最近，人们提出了一种基于复合混沌序列的图像加密方案。本文对该方案的安全性进行了研究，发现该方案存在以下问题：(1)选择明文的差分攻击只需选择3幅明文图像即可破解该方案；(2)存在多个弱密钥和一些等价的加密密钥；(3)该方案对明文图像的变化不敏感；(4)复合混沌序列不能作为良好的随机数源。(C)2008爱思唯尔B.V.保留所有权利。
Recently, an image encryption scheme based on a compound chaotic sequence was proposed. In this paper, the security of the scheme is studied and the following problems are found: (I) a differential chosen-plaintext attack can break the scheme with only three chosen plain-images; (2) there is a number of weak keys and some equivalent keys for encryption; (3) the scheme is not sensitive to the changes of plain-images; and (4) the compound chaotic sequence does not work as a good random number source. (C) 2008 Elsevier B.V. All rights reserved.