Cryptanalysis and improvement of a digital image encryption method with chaotic map lattices  

作　　者：王兴元 刘林涛 

机构地区：[1]Faculty of Electronic Information and Electrical Engineering,Dalian University of Technology

出　　处：《Chinese Physics B》2013年第5期198-202,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 61173183, 60973152, and 60573172);the Doctoral Program Foundation of Institution of Higher Education of China (Grant No. 20070141014);the Program for Excellent Talents in Universities of Liaoning Province, China (Grant No. LR2012003);the Natural Science Foundation of Liaoning Province, China (Grant No. 20082165);the Fundamental Research Funds for the Central Universities of China (Grant No. DUT12JB06)

摘　　要：A digital image encryption scheme using chaotic map lattices has been proposed recently. In this paper, two fatal flaws of the cryptosystem are pointed out. According to these two drawbacks, cryptanalysts could recover the plaintext by applying the chosen plaintext attack. Therefore, the proposed cryptosystem is not secure enough to be used in the image transmission system. Experimental results show the feasibility of the attack. As a result, we make some improvements to the encryption scheme, which can completely resist our chosen plaintext attack.A digital image encryption scheme using chaotic map lattices has been proposed recently. In this paper, two fatal flaws of the cryptosystem are pointed out. According to these two drawbacks, cryptanalysts could recover the plaintext by applying the chosen plaintext attack. Therefore, the proposed cryptosystem is not secure enough to be used in the image transmission system. Experimental results show the feasibility of the attack. As a result, we make some improvements to the encryption scheme, which can completely resist our chosen plaintext attack.

关 键 词：CRYPTANALYSIS chosen plaintext attack image encryption chaotic map lattice 

分 类 号：TN918.1[电子电信—通信与信息系统]