物理学报2011，Vol.60Issue(7)：67-74,8.
一类时空混沌加解密系统的安全分析
Security of chaos-based secure communications in a large community
摘要
Abstract
In this paper, we present an attack on a cryptosystem designed by using a spatiotemporal chaotic system. We show that the decryptiou 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.关键词
混沌密码/耦合映像格子/安全分析Key words
chaotic encryption/coupled map lattices/cryptanalysis分类
信息技术与安全科学引用本文复制引用
王开,裴文江,周建涛,张毅峰,周思源..一类时空混沌加解密系统的安全分析[J].物理学报,2011,60(7):67-74,8.基金项目
国家自然科学基金（批准号：60672095,60972165）,国家高技术研究发展计划（863计划）（批准号：2007AAllZ210）,教育部博士点基金（批准号：20100092120012,20070286004）,江苏省高技术研究项目,江苏省自然科学基金（批准号：BK2010240）,国家十一五密码发展基金,国家火炬计划项目资助的课题. （）
