然后在只基于求解离散对数难题和对消息增加冗余度的基础上，提出了一种改进方案。
To solve the above weakness, based on the Discrete Logarithm Problem, a secure improved scheme was proposed.
作者就此诸多问题，基于离散对数这一数学难题，提出了一种安全的多级代理签名方案。
To solve all these problems, a more secure multiple grade proxy signature scheme is proposed in this paper based on the study of a difficult mathematical concept, the discrete logarithm.
提出了一种新型代理签名方案，其安全性是建立在因子分解表述难题之上，因而不是基于离散对数密码体制的方案。
A new proxy signature scheme is proposed. The security is based on factoring representation problem, so it is not based on the discrete logarithm problem cryptosystem.
提出了一种新型代理签名方案，其安全性是建立在因子分解表述难题之上，因而不是基于离散对数密码体制的方案。
A new proxy signature scheme is proposed. The security is based on factoring representation problem, so it is not based on the discrete logarithm problem cryptosystem.
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