摘要
So fur, the security of many proxy signatures has seldom been considered in a formal way and most of them cannot satisfy nonepudiation. In this work, a novel ID-based (Identity-based) proxy signature scheme is proposed by combining the proxy signature with ID-based public cryptography, and they formalize the notion of security for ID-based proxy signature schemes. And show that the security of the proposed scheme is secure. Compured with other proxy signature schemes, it does not need a secure channel. Thus, it is particularly suitable for the unreliable network computation environment. Finally, they extend proposed scheme to a proxy multi-signature which has the following advantages (1) the size of proxy multi- signature is independent of the number of delegating users; (2) the computation cost of proxy multi-signature only need two Weil paring.
So fur, the security of many proxy signatures has seldom been considered in a formal way and most of them cannot satisfy nonepudiation. In this work, a novel ID-based (Identity-based) proxy signature scheme is proposed by combining the proxy signature with ID-based public cryptography, and they formalize the notion of security for ID-based proxy signature schemes. And show that the security of the proposed scheme is secure. Compured with other proxy signature schemes, it does not need a secure channel. Thus, it is particularly suitable for the unreliable network computation environment. Finally, they extend proposed scheme to a proxy multi-signature which has the following advantages (1) the size of proxy multi- signature is independent of the number of delegating users; (2) the computation cost of proxy multi-signature only need two Weil paring.
作者
ZHANG Jianhong1,2 , ZOU Wei3 1. College of Science, North China University of Technology, Beijing 100041,China
2. Institute of Software of Chinese Academy of Sciences /State Key Laboratory of Information Security, Beijing 100080, China
3. Institute of Computer Science and Technology, Peking University, Beijing 100871, China
基金
Supported by the Scientific Research Common Program of Beijing Municipal Commission of Education (KM200610009011) and the Open Foundation of State Key Laboratory of Information Security (04002)