期刊名称：International Journal of Security and Its Applications
印刷版ISSN：1738-9976
出版年度：2014
卷号：8
期号：5
页码：333-348
DOI：10.14257/ijsia.2014.8.5.30
出版社：SERSC
摘要：Strong designated verifier proxy signature (SDVPS) enables a proxy signer to sign messages on behalf of an original signer, and only the designated verifier can be convinced of the validity of the proxy signature, and the verifier cannot prove it to any third party. It is a combination of proxy signature and strong designated verifier signature. In this paper, we define a new formal definition and a new security model of existential unforgery of SDVPS, and then analyze a recently proposed SDVPS scheme, and give four attacks to the scheme, and further we give out an improved SDVPS scheme, and prove it in the new security model. Performance analysis shows the improved scheme is efficient and suitable for electronic commerce.
