【作者】 葛永德； 张淼；

【Author】 Yongde Ge,Miao Zhang Information Security Center,Beijing University of Posts and Telecommunications,Beijing,China,100876

【机构】 北京邮电大学信息安全中心；

【摘要】 通信技术的飞速发展和普及的同时,人们对通信过程的机密性和完整性要求也日益凸显。本文介绍4G标准LTE的两个候选核心算法:Snow 3G和ZUC算法,它们都是流序列算法,具有相似的机制和原理。本文对这两种算法的流程,以及LFSR、非线性函数、S-Box等主要功能模块进行了对比分析,并对Snow 3G算法和ZUC算法在特定密钥和初始向量所产生的密钥流的随机性进行测试,结果显示ZUC算法产生的密钥流随机性更好,其安全性比Snow 3G算法更高。更多还原

【Abstract】 With the rapid development of communications technology,the requirements on the Confidentiality and Integrity of the communication process are becoming increasingly prominent.This paper firstly introduced two 3GPP LTE candidate core algorithms:Snow 3G and ZUC,which are both stream cipher algorithm,and with similar mechanisms and principles.Then,not only a contrastive analysis about the workflows and function modules included LFSR,Nonlinear function and S-Box in the two algorithms are having done,but also presented the result of actual random testing experiments about the keystreams,and the keystreams are generated by feeding the different specific keys and the initial vectors respectively into the algorithms.Finally,we got a conclusion that ZUC is more secure compared with Snow 3G algorithm.更多还原