Secure Proxy Signature Schemes based on RSA Problems and Warrants
RSA 문제와 위임장에 기반한 안전한 대리서명 기법

Moon-Seog Seo, Phil-Sik Iang, Chool-Heon Choi
2011 The Journal of the Korea Contents Association  
Proxy signature schemes are configured as proxy signers on behalf of their original signers can be allowed to sign messages. Basic security requirements of proxy signature schemes include the strong unforgeability and the verifiability of delegation. So far, a variety of proxy signature schemes that proved on individual basic security terms but not proved on compounded security terms are proposed. Especially the proposed proxy signature schemes based on RSA problem are proved vulnerable to an
more » ... vulnerable to an attacker with his own private key in terms of the impersonating attack. A unauthorized attacker can generate the proxy signature without the appointee's consent or authorization. In this paper, we propose a proxy signature scheme based on RSA problems and warrants that can be proved the security against the impersonating attack. The proposed proxy signature scheme is analyzed on the safety and compared in terms of efficiency with other proxy signature schemes. ■ keyword :|Digital Signature|Public Key Infrastructure|Proxy Signature|Warrants|RSA Problem| * 본 논문은 2010학년도 대불대학교 교내연구비 지원에 의해 작성되었습니다.
doi:10.5392/jkca.2011.11.1.042 fatcat:pzbsp3assfd33czeynp7ekgo7e