针对访问驱动cache攻击HC-256算法的改进

Improved algorithm for HC-256 to access-driven cache attack

为了使HC-256可以防御访问驱动cache攻击,对HC-256算法进行了改进。在HC-256中加入完全随机排序算法,对表P和表Q进行扰乱,这样使用变化的表代替固定的S盒,使得攻击者获得的输入和输出都是不安全的,有效地防御了此访问驱动cache攻击。

In order to defense against the access-driven cache attack,this paper improved the stream cipher HC-256.Added full random sort algorithm to the HC-256,which disrupted the order of the tables P and Q.This paper used variable tables instead of（fixed content） S-boxes,and it gave the adversary insecurity both about the input and the output of the tables.It defenses against the access-driven cache attack effectively.