基于时空混沌的伪随机数发生器设计  

Design of pseudorandom-number generator based on spatiotemporal chaos

作　　者：涂光友[1] 何波[2] 

机构地区：[1]重庆大学计算机学院,重庆400044 [2]电子商务与现代物流重庆市高校市级重点实验室(重庆邮电大学),重庆400065

出　　处：《计算机应用》2013年第12期3499-3502,共4页journal of Computer Applications

基　　金：国家自然科学基金资助项目(61003256);中国博士后基金资助项目(20110490082);重庆市教委科技计划项目(KJ120506);重庆邮电大学自然科学基金资助项目(A2011-20)

摘　　要：时空混沌系统有很好的密码学特性,但目前基于该模型提出的伪随机数发生器存在效率不高的问题。为此,提出了一种高效的基于时空混沌的伪随机数设计方案。在产生伪随机数的过程中,将一些耗时操作尽可能地替换为一些快速操作,并尽可能地减少时空混沌模型自身的迭代次数,因此算法的效率得到有效提升。对算法所产生的伪随机序列的密码学属性进行了测试,结果表明该伪随机发生器方案不仅运算速度快,而且具有很好的密码学性能。The spatiotemporal chaotic system has good cryptographic properties, while the efficiency of the existing pseudorandom number generators based on this model is low. A new scheme to generate pseudorandom numbers with high efficiency based on a spatiotemporal chaotic system was proposed. In the process of generating pseudorandom numbers, the time-consuming operations were replaced by some fast ones and the iteration of the spatiotemporal chaotic system was reduced as possible, which made the generator own faster speed. The cryptographic performance of the pseudorandom sequences generated by this scheme was tested. The results show that the proposed scheme not only owns fast running speed and good cryptographic properties, but also has good cryptographic properties.

关 键 词：伪随机数发生器 混沌 混沌密码 流密码 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]