对两个提名代理签名方案的密码学分析

禹勇; 许春香; 周敏; 李发根

doi:10.3724/SP.J.1146.2008.00179

对两个提名代理签名方案的密码学分析

doi: 10.3724/SP.J.1146.2008.00179

基金项目:

国家自然科学基金(60673075)，现代通信国家重点实验室基金(9140C1107010604)，西安电子科技大学计算机网络与信息安全教育部重点实验室开放基金(2008CNIS-02)，广东省/广州市信息安全技术(密码学)实验室开放基金和电子科技大学青年科技基金资助课题

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出版历程
- 收稿日期: 2008-02-01
- 修回日期: 2008-06-25
- 刊出日期: 2009-05-19

Cryptanalysis of Two Nominative Proxy Signature Schemes

摘要

摘要: 该文分析了Seo等(2003)和黄振杰等学者(2004)提出的两个提名代理签名方案，指出这两个方案都不具备强不可伪造性。分别给出了一种伪造攻击，利用这种攻击，一个不诚实的原始签名人通过设置特定的参数，可以成功伪造代理签名密钥，从而可以假冒诚实的代理签名人生成有效的提名代理签名，威胁到代理签名人的合法权益。
- 数字签名;代理签名;提名签名
Abstract: Analyses of two nominative proxy signature schemes proposed by Seo et al.(2003) and Huang et al. (2004) are given in this paper. The results show that neither the scheme has the property of strong unforgeability. A forgery attack on the two schemes is given, respectively. Using the forgery attack, a dishonest original signer can forge a proxy signing key on behalf of the designated proxy signer by assigning some parameters and produce valid nominative proxy signatures, which does harm to the benefits of the proxy signers.

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参考文献(1)

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