An Image Encryption Algorithm with Parameters Controlled by External Keys

Journal of South China University of Technology (Natural Science Edition) ›› 2005, Vol. 33 ›› Issue (7): 20-23.

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An Image Encryption Algorithm with Parameters Controlled by External Keys

Peng Fei Qiu Shui-sheng Long Min

College of Electronic and Information Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China

Received:2004-08-12 Online:2005-07-25 Published:2005-07-25
Contact: 彭飞(1977-)，男，博士生，主要从事密码学及混沌保密通信研究． E-mail:eepengf@yahoo.com.cn
About author:彭飞(1977-)，男，博士生，主要从事密码学及混沌保密通信研究．
Supported by:
国家自然科学基金资助项目(60372004)；广东省自然科学基金资助项目(31445，20820)

Abstract

Abstract:

An image encryption algorithm is put forward based on a method that the initial conditions and iteration time of a chaotic system are obtained from external keys,then image signals are encrypted using the subsequently produced chaotic signals.The simulated results show that the proposed algorithm is a good spatial design algorithm for chaotic keys,and possesses a large space of keys,fairly well encryption effect and excellent security to statistic analyses and different attacks.

Key words: external key, encryption, chaos, chaotic sequence

Peng Fei Qiu Shui-sheng Long Min. An Image Encryption Algorithm with Parameters Controlled by External Keys[J]. Journal of South China University of Technology (Natural Science Edition), 2005, 33(7): 20-23.

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An Image Encryption Algorithm with Parameters Controlled by External Keys

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