Abstract: This paper analyzes the security of Designated Verifier Signature(DVS) scheme, and overcomes the problem of existing scheme that attacker can realize signature verification without knowing the private key of designated verifier by introducing secret information of signer. This scheme can insure the signature to be indistinguishable, resists signer to deny and private key generator to entrap. Compared with existing safety modes, this scheme has high security.

Key words: digital signature, Designated Verifier Signature(DVS), bilinear pairing

摘要： 分析指定验证者签名方案的安全性，通过引入签名者秘密信息，实现具有高安全性的指定验证者签名方案。克服原有方案中攻击者能在不知道指定验证者私钥的情况下实现签名验证的问题。该方案能保证签名不可区分，实现签名的不可抵赖性和密钥生成中心的不可诬陷性。与原有安全模式相比，其安全性更高。

关键词: 数字签名, 指定验证者签名, 双线性对

CLC Number: 

• TP309.2