Another ID-Based Proxy Signature Scheme and Its Extension  

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 

出　　处：《Wuhan University Journal of Natural Sciences》2007年第1期33-36,共4页武汉大学学报（自然科学英文版）

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)

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.

关 键 词：proxy signature MULTISIGNATURE security proof 

分 类 号：TN918.2[电子电信—通信与信息系统]