of;
Computer;
Science,;
South;
China;
Normal;
University,;
Guangzhou;
510631,;
China;
of;
Computer;
Science,;
Shanghai;
Jiaotong;
University,;
Shanghai;
200240,;
China;
Key;
Laboratory;
of;
Scalable;
Computing;
and;
Systems,;
Shanghai,;
China;
安全性分析; 密钥长度; Hash函数; 安全散列函数; 汇率; 碰撞攻击; 块密码; 比特;