针对LEX算法的截断滑动攻击

Interruption Slide Attack against Stream Cipher LEX Algorithm

论文讨论了滑动攻击的基本原理,提出了截断滑动攻击的概念,利用截断滑动攻击分析了改进的LEX流密码算法。针对截断滑动攻击对LEX算法安全性的影响,文章对改进的LEX的密钥扩展方案做了修改,使滑动攻击和截断滑动攻击对改进的LEX不再有效。

This paper discusses the basic principle of the slide attack thought, and proposes a concept of the interruption slide attack. It then analyzes the security of improved stream cipher LEX algorithm by applying the interruption slide attack. In accordance with the influences of interruption slide attack on the security of LEX, the key scheme algorithm of LEX is modified so that the slide attack and interruption slide attack against LEX is no longer of effects.