Journal
COMPUTER JOURNAL
Volume 58, Issue 4, Pages 792-807Publisher
OXFORD UNIV PRESS
DOI: 10.1093/comjnl/bxt132
Keywords
proxy signature; identity-based cryptography; identity-based proxy signature; security model; efficiency
Categories
Funding
- Research Grants Council of the Hong Kong SAR, China [CityU 114609]
- CityU Applied RD Funding (ARD) [9681001, 6351006]
- CityU Strategic Research Grant [7008110]
- CityU Applied Research Grant (ARG) [9667052]
- ShenZhen-HK Innovation Cycle Grant [ZYB200907080078A]
- NSF (China) [61070222/F020802]
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Presently, many identity-based proxy signature (IBPS) schemes have been proposed, but most of them are constructed in the random oracle model. Also, the proposed security model for IBPS is not enough complete according to Boldyreva's work. Cao and Cao proposed an IBPS scheme in the standard model. However, their scheme is not secure because of not resisting the attack of delegator and requires more computation cost. In this paper, we present a framework for IBPS and show a detailed security model for IBPS. Under our framework, we present an efficient IBPS scheme in the standard model. Compared with other IBPS schemes, the proposed scheme has more complete security and is more efficient.
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