基于ID的一次性盲公钥

One-Off Blind Public Key Based on ID

盲签名的匿名性不仅能保护个人的隐私 ,也同样给犯罪分子带来了可乘之机 .为了解决这一问题 ,一些方案利用了可信中心给用户颁发的公私钥 ,然而 ,用户的不同活动可由用户的公钥及证书联系起来 .为了避免这种联系 ,本文利用RSA和Fiat-Shamir身份鉴别方案提出了一种简单易行的方案 ,只需可信中心给用户颁发一次私钥 ,而由用户在每次使用时根据该私钥来生成不同的公钥 ,从而保证了多次使用活动的不可联系性 .同时在法院授权许可的情况下 ,可信中心可以揭示用户的身份 。

The anonymity of blind signatures can protect individual privacy,and gives the criminal a chance.For resolving this problem,some schemes make use of the public key and the private key issued by CA,but the consumer′s actions can be connected by the consumer′s public key and certificate.For avoiding this connection,a new simple scheme based on RSA and Fiat Shamir Identification scheme is introduced.It only needs CA issuing the private key one time for the consumer,and the consumer can generate his different public keys each time he uses it.So this scheme can ensure the disconnection among the consumer′s actions.And CA can reveal the consumer′s identity under the court ′s grant to prevent the consumer committing.