Abstract: As the existed identity-based proxy blind signature schemes either not been proven secure formalized, or only provably secure in the Random Oracle model, an identity-based proxy blind signature scheme in the standard model is proposed. The basic signature algorithm of the new scheme employs the identity signature algorithm proposed by Paterson et al. Based on the standard security model proposed by Paterson et al, the adversary model of proxy signatures, and the security model for blind signatures, a standard security model for identity-based proxy blind signature is proposed. In this security model, the new scheme has been proven to meet unforgeable and blind, achieves provable security.

Key words: identity-based cryptography, proxy blind signature, standard model, computational Diffie-Hellman problem

摘要： 由于现有的基于身份代理盲签名方案要么没有得到形式化的安全证明，要么仅在随机预言（Random Oracle，RO）模型下可证明安全，提出一种标准模型下的基于身份代理盲签名方案。该方案的基本签名算法采用了Paterson等人提出的基于身份签名机制。在Paterson等人提出的标准安全模型基础上，引入代理签名敌手模型，并参考盲签名的安全模型，提出基于身份代理盲签名的标准模型。在此安全模型下，该方案被证明满足不可伪造性和盲性，具有可证明安全性。

关键词: 基于身份密码学, 代理盲签名, 标准模型, 计算DH问题