1-out-of-n不经意传输的变换及应用

提出了不经意传输的一个新应用——在群签名中的应用。首先给出了文献1]的1-out-of-n不经意传输协议的一个变形,利用该变形协议提出了一种新的群签名成员资格撤销方法。该撤销方法是一个一般性的方法,可通用于任何群签名方案,而以前的撤销方法都是针对某一具体签名方案的,不具有通用性。在随机预言机模型以及计算Diffie-Hellman (CDH)假设下,可证明新协议是安全的。

Transformation of 1-out-of-n Oblivious Transfer and Its Application

A new application to group signature on 1-out-of-n oblivious transfer is proposed. After introducing, the transformation of 1-out-of-n oblivious transfer protocol proposed by Ref.1], a new membership revocation method in group signature is proposed by use of the transformation protocol. The proposed method is a universal method and can be applied to any group signature scheme; however, the previous revocation methods are only applicable to a specific group signature scheme. Under the random oracle model and computational Diffie-Hellman (CDH) assumption, the proposed protocol is provably secure.