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

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.