群盲签名的通用可组合性研究

Universally composable group blind signature

协议的UC安全性可以确保它在并发环境下运行的安全性。在UC框架下提出了一个群盲签名的理想函数,并在离散对数假设下构造了一个具有UC安全的群盲签名协议;然后分析了此协议的安全性,并详细地证明了群盲签名可以安全实现理想函数。结果证明所提出的通用可组合群盲签名可以安全地运行在并发环境中。

Secure protocol is security under the universally composable （UC） framework can ensure the security of protocol running in concurrent environment. This paper defined an ideal function of group blind signature under the framework and construeted an UC secure group blind signature （GBS） protocol based on the discrete logarithm assumption. In the end,it analyzed the security of the protocol and proved that the protocol could realize the ideal function. Results show that GBS can safely run in concurrent environment.