%0 Journal Article
%T Security of chaos-based secure communications in a large community<br>一类时空混沌加解密系统的安全分析
%A Wang Kai
%A Pei Wen-Jiang
%A Zhou Jian-Tao
%A Zhang Yi-Feng
%A Zhou Si-Yuan
%A <br>王开
%A 裴文江
%A 周建涛
%A 张毅峰
%A 周思源
%J 物理学报
%D 2011
%I 
%X In this paper, we present an attack on a cryptosystem designed by using a spatiotemporal chaotic system. We show that the decryption system proposed in (Phys. Rev. E 66, 065202 (2002)) degenerates to the one-dimensional map under the constant input, and it is insensitive to the slight perturbations to input in specially selected intervals. Consequently, the attacker can use a very simple optimization algorithm to obtain the proper input value within only hundreds of iterations. Furthermore, we prove that there exits a linear dependency between the secret key and the obtained input value, so that the attacker can break this spatiotemporal chaos-based secure communication scheme easily. Both theoretical and experimental results show that the lack of security discourages the use of these cryptosystems for practical application.
%K chaotic encryption
%K coupled map lattices
%K cryptanalysis<br>混沌密码
%K 耦合映像格子
%K 安全分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=27C14E609A3E452C1CEC4C1EA53ADC35&yid=9377ED8094509821&vid=BFE7933E5EEA150D&iid=DF92D298D3FF1E6E&sid=6713DCA6F9DB0BE0&eid=6713DCA6F9DB0BE0&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=17