Spatiotemporal chaotic image cryptography

doi:10.3778/j.issn.1002-8331.2009.21.023

Computer Engineering and Applications ›› 2009, Vol. 45 ›› Issue (21): 82-84.DOI: 10.3778/j.issn.1002-8331.2009.21.023

• 网络、通信、安全 • Previous Articles Next Articles

Spatiotemporal chaotic image cryptography

CUI Xue-bing ^1，2，SHAO Guo-jin¹，LI Guo-hui²

1.Department of Computer Science and Engineering，Henan University of Urban Construction，Pingdingshan，Henan 467001，China
2.College of Computer Science，Huazhong University of Science and Technology，Wuhan 430074，China

Received:2009-04-01 Revised:2009-06-02 Online:2009-07-21 Published:2009-07-21
Contact: CUI Xue-bing

一种时空混沌的图像密码

崔雪冰^1，2，邵国金¹，李国徽²

1.河南城建学院计算机科学与工程系，河南平顶山 467001
2．华中科技大学计算机科学与技术学院，武汉 430074

通讯作者: 崔雪冰

Abstract

Abstract: To solve the drawbacks of some chaotic image encryption schemes，a new image encryption based on spatiotemporal chaos and Arnold mapping is presented.The feedback mechanism is introduced into the pixels’ encryption procedure；As a result，the generation of keystream is related with the secret key and plaintext；therefore the encryption scheme can resist the chosen plaintext attack effectively.In addition，the combination of permutation and diffusion（pixel-value encryption） for several rounds embodies the advantage of product cipher，which makes the equivalent secret key attack fail.At last，analysis and experiments prove the validity of the scheme.

Key words: chaos, Arnod mapping, Coupled Map Lattice（CML）, image emcryption, permutation

摘要： 针对现有算法的一些不足，结合Arnold映射和耦合映射格（CML）设计了一种新的图像加密算法，将密文反馈机制引入算法的像素值加密过程中，使密钥流的生成不仅与密钥相关，而且与明文相关，可有效抵抗选择明文攻击和选择密文攻击；另外，由于加密过程将置换和替代（像素值加密）多轮使用，乘积密码的优点得以体现，这就使等效密钥分析很难奏效。最后通过实验验证了算法的安全性和有效性。

关键词: 混沌, Arnold映射, 耦合映射格（CML）, 图像加密, 置乱

CUI Xue-bing ^1，2，SHAO Guo-jin¹，LI Guo-hui². Spatiotemporal chaotic image cryptography[J]. Computer Engineering and Applications, 2009, 45(21): 82-84.

崔雪冰^1，2，邵国金¹，李国徽². 一种时空混沌的图像密码[J]. 计算机工程与应用, 2009, 45(21): 82-84.

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Spatiotemporal chaotic image cryptography

一种时空混沌的图像密码

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