基于身份的门限多代理多盲签名方案

Identity-based threshold multi-proxy blind multi-signature scheme

为了提高代理盲签名的实用性和灵活性,结合基于身份的密码体制和秘密共享技术,提出了基于身份的门限多代理多盲签名方案。在该方案中,原始群和代理群的管理员通过分发共享秘密来控制群成员的行为,在群成员获得共享秘密后,一定数量的原始签名者合作可以进行授权,一定数量的代理签名者合作可以产生签名。该方案解决了多个代理签名者代表多个原始签名者进行盲签名的问题,经分析得知,方案同时具有代理签名、盲签名和门限签名所具有的安全性质,如不可伪造性、不可否认性、盲性、不可追踪性和鲁棒性等。

In order to improve the practicality and flexibility of proxy blind signature,this paper proposes an identity-based threshold multi-proxy blind multi-signature scheme by adopting identity-based cryptography and secret sharing scheme.In this scheme,the administrators of the original group and proxy group can control the behavior of their members by distributing the shared secrets.After original signers and proxy signers obtain the shared secrets,some original signers can cooperatively delegate their signing capability to proxy signers,and some proxy signers can cooperatively generate threshold multi-proxy blind multi-signature.The scheme solves how to generate blind signature while multiple proxy signers sign the message on behalf of multiple original signers.By analyzing the scheme,it is concluded that the scheme has many security properties,such as unforgeability,nonrepudiation,blindness,untraceability,robustness etc.