Abstract: Aiming at the low efficiency problem of the existing designated verifier signatures, based on bilinear pairings and random property of extra parameter, a new efficient identity-based designated verifier signature is proposed. Under the assumption of DBH problem, security analysis in cryptography is carried out to analyze the efficiency of the scheme. Results show that the scheme’s efficiency is better than that of some existing ones under the condition of keeping all kinds of the security characteristics of designated verifier signature such as unforgeabilty and non-transferability. Its length of signature is shorter, so it is more propitious to applications in society.

Key words: bilinear parings, identity-based, designated verifier signature

摘要： 针对目前指定验证者签名效率不高的问题，基于双线性对并借助附加参数的随机特性提出一种高效的基于身份的指定验证者签名方案，在DBH困难问题的假设下，采用密码学安全性分析的方法。结果证明，该方案在保持指定验证者不可仿造性和不可转移性等各种安全特性的条件下，效率高于已有方案。由于其签名长度更短，因此更适合于实际应用。

关键词: 双线性对, 基于身份, 指定验证者签名

CLC Number: 

• TP309