A New Stream Ciphers Based on Hyperchaotic Map

摘要：

A new algorithm for generating pseudorandom-bit sequence from a single spatiotemporal chaotic system is proposed in this paper. A coupled map lattice is adopted as a prototype of a spatiotemporal chaotic system. Key streams are generated from the coupled map lattice by using simple algebraic computations, and then are used to encrypt plaintext via bitwise XOR. These make the cipher rather simple and efficient. The cryptographic properties of the pseudorandombit generator based on the coupled map lattice are analyzed which hurdles the shortcoming of mutual restriction between the successive values of the original hyperchaotic sequence. Finally, this paper presents analysis on the speed and security analysis. The results show that the new sequence can be a good candidate for constructing a secure cipher.

关键词： hyperchaos encryption systems CML stream cipher security

作者: Lin Jinqiu Si Xicai

作者单位: Information and Communication Engineering College Harbin Engineering University，Harbin, Heilongjiang Province, China

会议类型: 国际会议

会议名称: 2009 2nd IEEE International Conference on Computer Science and Information Technology(第二届计算机科学与信息技术国际会议 ICCSIT2009)

会议地点: 北京

会议语种:英文

页码: 366-369

在线出版日期: 2009-08-08（万方平台首次上网日期，不代表论文的发表时间）