摘要
为增强流密码算法LEX抵抗滑动攻击的能力,基于变换密钥的思想,采取双行LEX关联的做法对其进行了改进。在此基础上,分析了改进算法的安全性和运算速度,并用一个实例仿真来检验了改进算法的密钥流随机性。结果表明,改进的LEX算法能够抵抗滑动攻击,并保持了与原LEX算法相同的运算速度和密钥流随机性,提高了LEX算法的密码性能。
In order to enhance its ability in resisting slide attack and based on key-transformation idea,the stream cipher LEX algorithm is modified with a double LEX-line structure.In light of this,the safety and operating speed of the modified LEX algorithm is analyzed,and a simulation also conducted to test the randomness of the key stream.Simulation results show that this modified algorithm can resist slide attack while keeping the same computing speed and keystream randomness of the original LEX algorithm,and thus greatly improves the performance of LEX algorithm.
出处
《通信技术》
2015年第2期203-207,共5页
Communications Technology
基金
国家自然科学基金项目(No.61271254)~~
