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Multi-designated Verifiers Signatures

机译:多重指定的验证者签名

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摘要

Designated verifier signatures were introduced in the middle of the 90's by Jakobsson, Sako and Impagliazzo, and independenty pa-tended by Chaum as private signatures. In this setting, a signature can only be verified by a unique and specific user. At Crypto'03, Desmedt suggested the problem of generalizing the designated verifier signatures. In this case, a signature should be intended to a specific set of different verifiers. In this article, we provide a formal definition of multi-designated verifiers signatures and give a rigorous treatment of the security model for such a scheme. We propose a construction based on ring signatures, which meets our definition, but does not achieve the privacy of signer's identity property. Finally, we propose a very efficient bi-designated verifiers signature scheme based on bilinear maps, which protects the anonymity of signers.
机译:Jakobsson,Sako和Impagliazzo在90年代中期引入了指定的验证者签名,Chaum将其作为独立签名进行了独立签名。在此设置中,签名只能由唯一且特定的用户验证。在Crypto'03上,Desmedt提出了将指定的验证者签名泛化的问题。在这种情况下,签名应针对一组特定的不同验证者。在本文中,我们提供了多个指定验证者签名的正式定义,并对这种方案的安全模型进行了严格的处理。我们提出了一种基于环签名的构造,该构造符合我们的定义,但不能实现签名者身份属性的私密性。最后,我们提出了一种基于双线性映射的非常有效的双向指定验证者签名方案,可以保护签名者的匿名性。

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