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通用指定验证者签名证明(UDVSP)系统旨在保护签名拥有者的私有性,即从签名者得到有效签名的拥有者确信某个验证者他拥有有效签名,但是没有泄露签名的任何信息.与通用指定验证者签名相比,现有的UDVSP拥有指定的验证者不必预先建立自己的公私钥对的优点,以及如下缺点:①在签名拥有者和验证者之间存在一个交互协议;②签名拥有者不能验证指定验证者的身份.结果任意的攻击者都可以冒充指定验证者.文章给出了基于身份的非交互UDVSP和它的安全性定义.接着使用双线性对最早构造了基于身份的非交互UDVSP,该证明具有如下的优点:①指定验证者不需建立公私钥对;②证明是非交互的;③只有指定的验证者才能相信签名拥有者拥有签名者的有效签名.而且,在DLP,CDH,SDH和BPI是难的假设下,本系统是安全的.
The Universal Assigned Authenticator Signing (UDVSP) system is designed to protect the privacy of the signatory owner, that is, the owner who obtained the valid signature from the signer believes that a certifier has a valid signature but does not reveal any information about the signature, Existing UDVSPs have the advantage that designated verifiers do not have to pre-establish their own public and private key pairs, as well as the following drawbacks compared to the designated verifier signature: (1) there is an interaction protocol between the signature owner and the verifier; (2) the signature owner Can not verify the identity of the designated verifier.As a result, any attacker can pretend to be the designated verifier.The article gives the identity-based non-interactive UDVSP and its security definition.And then using bilinear pairs to construct the earliest identity-based Interaction UDVSP has the following advantages: (1) The designated verifier does not need to establish the public-private key pair; (2) The proof is non-interactive; (3) Only the designated verifier can trust the signature owner to have the valid signature of the signer; This system is safe under the assumption that CDH, SDH and BPI are difficult.