Improved certificateless multi-proxy signature

doi:10.1016/S1005-8885(11)60288-4

中国邮电高校学报(英文) ›› 2012, Vol. 19 ›› Issue (4): 94-105.doi: 10.1016/S1005-8885(11)60288-4

Improved certificateless multi-proxy signature

徐洁¹,孙洪祥²,²,温巧燕³,张华²,²

1. 北京邮电大学理学院
2. 北京邮电大学网络与交换技术国家重点实验室

收稿日期:2011-11-15 修回日期:2012-03-20 出版日期:2012-08-31 发布日期:2012-09-12
通讯作者: 徐洁 E-mail:cheer_11@163.com
基金资助:
国家自然科学基金项目;中央高校基本科研业务费专项资金资助

Improved certificateless multi-proxy signature

XU Jie,SUN Hong-xiang,WEN Qiao-yan,ZHANG Hua

School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China 2. State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2011-11-15 Revised:2012-03-20 Online:2012-08-31 Published:2012-09-12
Supported by:
This work was supported by the National Natural Science Foundation of China (61170270, 61100203, 60903152, 61003286, 61121061), and the Fundamental Research Funds for the Central Universities (BUPT2011YB01, BUPT2011RC0505, 2011PTB-00-29, 2011RCZJ15, 2012RC0612).

摘要/Abstract

摘要：

Multi-proxy signature is a scheme that an original signer delegates his or her signing capability to a proxy group. In the scheme, only the cooperation of all proxy signers in the proxy group can create a signature on behalf of the original signer. Jin and Wen firstly defined the formal security model of certificateless multi-proxy signature (CLMPS) and proposed a concrete CLMPS scheme. However, their construction has three problems: the definition of the strengthened security model is inaccurate, the concrete signature scheme has a security flaw, and the proof of the security is imperfect. With further consideration, a remedial strengthened security model is redefined, and an improved scheme is also proposed, which is existentially unforgeable against adaptively chosen-warrant, chosen-message and chosen-identity attacks in the random oracles. In this condition, the computational Diffie-Hellman (CDH) assumption is used to prove full security for our CLMPS scheme.

关键词:

certificateless, multi-proxy signature, provable security, bilinear map

Abstract:

Key words:

certificateless, multi-proxy signature, provable security, bilinear map

XU Jie,SUN Hong-xiang,WEN Qiao-yan,ZHANG Hua. Improved certificateless multi-proxy signature[J]. Acta Metallurgica Sinica(English letters), 2012, 19(4): 94-105.

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Improved certificateless multi-proxy signature

Improved certificateless multi-proxy signature

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