基于可信平台模(TPCM)的盲签名方案

Blind signature scheme based on trusted platform computation module

针对基于身份的盲签名过程中PKG密钥泄露问题,提出了基于可信平台控制模块的盲签名方案,该方案中签名信息对签名者不可见,无法追踪签名信息。盲签名方案采用可信的秘密共享分配中心(SDC,share distribution center)和TPCM合作生成用户的签名密钥,不单独产生用户私有密钥,解决了用户的密钥托管问题,可以有效地防止用户的密钥泄露,保护了用户的匿名性和签名的不可追踪。最后在随机语言机模型下证明了该方案的安全性,与传统的盲签名方案对比,本方案计算效率较高。

For the key leak problem in identity-based blind signature, a blind signature scheme based on the trusted platform control module(TPCM) was presented. The message which will be signed is unknown to the signer, and the information of the signature cannot be tracked. In the blind signature scheme, the secret share distribution center and the TPCM cooperate to generate the user's signature key, and the user's private key is not alone to be produced. So it solves the key escrow problem, and can also be effective to prevent disclosure of the user's key and protect the user's anonymity and the no track of the signature. Finally random oracle was used to prove the security of the scheme. Compared with the traditional scheme, the proposed scheme has better computational efficiency.