Abstract: Partially blind signature schemes in practice can not only protect the message sender’s privacy efficiently but also limit the sender’s ability by embedding the signer’s information.A threshold signature scheme distributes the signing abilities to a group of signers,and avoids the system unsecurity.Recently the researches in these two signature schemes are popular.Meanwhile the signature schemes from bilinear pairings have attracted more attentions.In this paper a new threshold partially blind signature scheme from bilinear pairings was proposed. Further more the security and efficiency of the proposed scheme were analyzed.

Key words: threshold signature, partially blind signature, bilinear pairings, elliptic curve

摘要： 部分盲签名方案既有效保护消息发送方的隐私权,又通过加入签名方的信息控制发送方的权限。门限签名方案将密钥进行分享,限制了由单个签名者所组成的系统的不安全性。同时,基于双线性对的数字签名方案备受关注。文中基于双线性对提出一种新型的门限部分盲签名方案,并分析了该方案的安全性和效率,是第一次将双线性对引入到门限部分盲签名方案中。

关键词: 门限签名, 部分盲签名, 双线性对, 椭圆曲线