代替密码

“帐户授权恢复”不能代替密码。

Delegated Account Recovery doesn 't replace passwords .

分析发现，在实际应用中，离散对数函数可以代替密码杂凑函数，实现混合变换和消息完整性验证功能，并具有抗原像攻击、抗碰撞攻击等安全性。

We find that cryptographic hash functions could be replaced by discrete logarithm functions in some scenarios , such as mixing-transformation and message integrity verification . Secure discrete logarithm functions also have collision resistance and pre-image resistance , which are some security attributes that cryptographic hash functions should have .

从方便性及有效性的角度来说，基于身份密码能很好的代替基于证书密码，在第五章我们提出了一个基于身份的门限群签名方案。

From view point of the convenience and efficiency , ID-based cryptography could take the place of CA-based cryptography very well . We will give an ID-based proactive threshold signature scheme in chapter 5 .

可变置换控制的代替&置换网络密码系统

Substitution - Permutation Network Cryptosystem Controlled by Variable Permutation

基于这一模型，设计了一个称为基于全非奇异矩阵的代替置换网络的密码结构。

Based on this model , a new crypt structure called completely nonsingular matrix based substitution permutation network is designed .