共查询到20条相似文献,搜索用时 46 毫秒
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Baoyuan Kang Author Vitae Colin Boyd Author Vitae 《Journal of Systems and Software》2009,82(2):270-273
Unlike ordinary digital signatures, a designated verifier signature scheme makes it possible for a signer to convince a designated verifier that she has signed a message in such a way that the designated verifier cannot transfer the signature to a third party. In a strong designated verifier signature scheme, no third party can even verify the validity of a designated verifier signature, since the designated verifier’s private key is required in the verifying phase. Firstly, this paper proposes the model of identity-based strong designated verifier signature scheme based on bilinear pairings by combining identity-based cryptosystem with the designated verifier signature scheme, and then, provides one concrete strong identity-based designated verifier signature scheme, which has short size of signature, low communication and computational cost. We provide security proofs for our scheme. 相似文献
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A novel ID-based designated verifier signature scheme 总被引:3,自引:0,他引:3
In a designated verifier signature scheme, only the designated verifier can verify the validity of a signature. This paper studies an Identity-based Strong Designated Verifier Signature (IBSDVS) scheme based on bilinear pairings by combining ID-based cryptosystem with the designated verifier signature scheme. We analyze the security of the scheme and the result shows that the security of our proposed scheme is closely related to the Bilinear Diffie-Hellman problem and the scheme is against delegatability attack. 相似文献
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针对基于身份公钥密码系统下的强指定验证者签名中的第三方完全可信问题及已有签名方案效率不高的问题,利用基于证书密码系统中证书认证机构(CA)的信任级别低的优点,提出了一个新的强指定验证者签名方案。在随机预言模型下基于双线性Diffie-Hellman(BDH)问题假设给出了形式化的安全性分析。通过性能分析可看出:该方案能满足强指定验证者签名方案的所有性质,且签名长度仅为群中一个元素,具有较高的通信效率,适用于带宽受限的环境。 相似文献
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Seung-Hyun Seo Jung Yeon Hwang Kyu Young Choi Dong Hoon Lee 《Computer Standards & Interfaces》2008,30(5):288-295
An identity-based (ID-based) universal designated verifier signature (ID-UDVS) scheme allows a signature holder to designate a specific verifier of the signature by using a simplified public identity such as e-mail address. In the paper, we present an efficient identity-based universal designated multi-verifiers signature (ID-UDMVS) scheme by extending a single verifier to a set of multi-verifiers for verification of a signature. To achieve our goal, we construct an ID-based signature scheme providing batch verification and then, using this scheme as a building block, we firstly propose an ID-UDMVS scheme with constant signature size. Interestingly our construction method can be used as a generic method transforming an ID-UDVS scheme, which is defined in a bilinear version of the so-called ∑ protocol, to an ID-UDMVS scheme. 相似文献
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强指定验证者签名能够解决不向第3方证明发送方身份的前提下,仅指定的接收方可验证消息发送方身份的问题。基于计算双线性Diffe-Hellman假定,利用双线性对,提出了一种强指定验证者签名方案。该方案具有不可伪造性、签名者身份的隐私性和不可传递性。在团购、政府招标、艺术品拍卖等典型电子商务应用中具有现实意义。 相似文献
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Ting-Yi Chang 《Information and Computation》2011,209(7):1007-1015
In an ID-based universal designated verifier signature scheme, a single signer generates a signature that can only be verified by a designated verifier using a simplified public identity such as an e-mail address. In this paper, we expand the scheme to a multi-user setting for generating and verifying signatures in practical applications. An ID-based multi-signer universal designated multi-verifier signature scheme based on bilinear pairings is proposed that allows a set of multi-signer to cooperatively generate a signature and designate a set of multi-verifier to verify it. The security of the proposed scheme is demonstrated to be resistant to existentially forgery from adaptive chosen-message and chosen-ID attacks under the Bilinear Diffie-Hellman problem. 相似文献
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基于身份的新型盲签名与代理签名 总被引:2,自引:1,他引:1
随着互联网电子商务等业务的迅速发展,盲签名与代理签名逐渐成为网络安全研究的热点。现有的一些盲签名与代理签名方案大多建立在可信第三方TTP的基础之上,签名能否顺利进行主要依赖于TTP,如果TTP伪造签名或受到攻击,那么签名将失效。基于椭圆曲线上的双线性对理论,提出了一类新的基于身份无需可信第三方的盲签名与代理签名方案。在CDH问题是困难的假设下,新方案被证明是安全的。在计算量方面,盲签名方案和代理签名方案各仅需两次对运算,效率比目前最好的Zhang和Wang方案高一倍。 相似文献
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一种基于仲裁者的代理签名方案 总被引:1,自引:1,他引:1
目前已知的一些代理签名方案都是由原始签名者、代理签名者和签名验证者三方共同来完成,存在着原始签名者在线的问题。论文引入可信第三方,即仲裁者这一新的角色,并提出了一种由仲裁者、代理签名者和签名验证者参与的代理签名方案,有效地在代理签名方案中弥补了原始签名者在线的不足,并通过证书的“绑定”实现了通信双方的身份验证。 相似文献
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提出了一个新的基于双线性对的基于身份的强代理盲签名方案,并构造了一个基于身份的多级强代理盲签名方案,实现了签名权利在许可范围内逐级向下代理的要求,并对方案的安全性和执行效率进行了分析。同时,方案也满足强代理签名以及强盲签名方案的各种性质,有效地防止了签名权利的滥用,因此,新方案具有实现简单而且安全性高的特点。 相似文献
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In 1996, Jakobsson et al. proposed a designated verifier signature scheme in which only one specified person, called a designated verifier, can be convinced of the validity of the signature and the identity of the signer. This is possible by giving the designated verifier the ability to simulate a signature him/herself in an indistinguishable way. Therefore, the other third party cannot determine whether the signature is from the signer or the designated verifier. However, in some circumstances, the third party may be convinced that a signature intended for the designated verifier is actually generated by the signer.In 2003, Saeednia et al. proposed a strong designated verifier signature scheme to overcome this problem. However, we found that Saeednia et al.'s scheme would reveal the identity of the signer if the secret key of this signer is compromised. In this paper, we provide a new strong designated verifier signature scheme that provides signer ambiguity, even if the secret key of the signer is compromised. We also analyze the proposed scheme. 相似文献
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发现左卫平等人提出的基于身份无可信私钥产生中心的指定验证人代理签名方案存在一个安全漏洞,即代理人根据原始签名人的授权可计算出原始人的私钥,从而可直接伪造原始签名人的签名或任何授权。针对此方案的缺陷,提出了改进措施,分析表明改进后的方案是安全的,可抵抗代理人恶意的伪造攻击,还可以抵抗代理人和私钥产生中心联合的恶意攻击。 相似文献
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张学军 《计算机工程与应用》2008,44(13):33-35
在一个指定验证者签名方案中,只有指定的验证者才能验证签名的有效性。论文基于双线性对提出一种新的基于身份的广义指定多个验证者签名方案。新方案采用引进两个独立PKG的方法,在一定程度上消除了单个PKG可以伪造用户签名的安全缺陷。证明了在BDH问题假设和随机预言机下新方案是安全的。 相似文献
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指定接收者的代理签名是将签名的能力委托给代理签名者,其对预先设定的用户进行签名。结合Mehta和Harn的一次代理签名方案和陷门hash函数,首次提出了指定接收人的一次代理签名方案,该方案不仅满足代理签名所需的安全要求,如不可伪造性、可验证性、一次性等,而且,与其它方案相比较,由于方案的运算量分成offline和online两个阶段,从而其效率大大提高。 相似文献