一个安全有效的有向门限签名方案  

A secure and efficient directed threshold signature scheme

作　　者：沈忠华[1] 于秀源[1] 

机构地区：[1]杭州师范学院数学系,浙江杭州310012

出　　处：《浙江大学学报（理学版）》2006年第4期393-395,402,共4页Journal of Zhejiang University（Science Edition）

基　　金：国家自然科学基金资助项目(10271037);浙江省自然科学基金资助项目(103060);杭州师范学院科研基金项目(2006XNZ03)

摘　　要：签名只有接受者才能验证,而任何第三方只有在接受者的合作下才能验证签名的数字签名方案称之为有向签名.而在大多数情况下,有向签名通常是一个人,然而当所需签名的消息代表一个群体时,就需要群体中的一部分人同意,门限签名方案就被用作解决这个问题.由于在许多特定的应用环境下,一个可被所有成员信任的可信中心并不存在,所以不需要可信中心的门限签名方案就显得很有吸引力.文章提供了一个安全有效的有向门限签名方案.The signature on the message should be that only the signature receiver can verify the signature and prove the validity of the signature to any third party. The validity of signature without his cooperation is checked. In most situations, the signer is generally a single person. However, when the message is written on behalf of an organization, a valid message may require the approval or consent of several people. Threshold signature is a solution to this problem. Generally speaking, as an authority which can be trusted by all members doesn＇t exist, a threshold signature scheme without a trusted party appears more attractive. A directed threshold signature scheme is proposed.

关 键 词：有向签名 门限签名 可信中心 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]