For on-line payment system, the new scheme has higher security and reliability than the digital signature schemes previously proposed.
对于在线支付系统，新方案比以前提出的数字签名方案更具优势，会进一步提高系统的安全性和可靠性。
Up to now most of the known proxy digital signature schemes are based on discrete logarithmic problems or big number factorization problems.
现有的代理数字签名方案大多是基于离散对数问题和大数因子分解问题的方案。
To make the technology of digital signature be more widely applied, researched the security of the digital signature schemes in the multi-user setting.
为了使数字签名技术得到更广泛应用，研究了数字签名方案在多用户环境中的安全性。
As a special digital signature scheme, proxy digital signature can settle some proxy problems which other normal digital signature schemes cann't solve.
代理数字签名作为一种特殊的数字签名体制，可以实现普通数字签名无法解决的代理问题。
Thirdly, the construction and security of blind digital signature schemes is analysed as a system and further expound the security of two newly-emerged typial blind signature agreements.
对电子现金中使用的盲数字签名方案的构造和安全问题进行了系统分析。
At present, digital signature and proxy digital signature schemes are almost based on ordinary separate logarithm question. And the security of the schemes couldn't satisfy the request of the people.
目前的数字签名和代理数字签名方案大都是基于普通离散对数难解问题上的，其安全性已经不能满足人们的需求。
In this paper, two schemes for digital signature with message recovery are presented. The security of these schemes is based on factorization and discrete logarithms.
本文设计了两种具有消息恢复的数字签名方案，其安全性都是基于因子分解问题和离散对数问题的。
Zero-knowledge proof schemes of possessing a RSA digital signature are proposed.
提出了一种拥有RS A数字签名的零知识证明方案。
Then digital signature and authentication schemes are given.
同时给出了数字签名和身份认证方案。
All multi signature schemes meet the basic needs of digital signature, and have good security and feasibility.
它们都满足数字签名的基本要求，并具有良好的安全性和实用性。
All multi signature schemes meet the basic needs of digital signature, and have good security and feasibility.
它们都满足数字签名的基本要求，并具有良好的安全性和实用性。
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