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ID기반 온라인/오프라인 사인크립션(Signcryption) 기법Identity-Based Online/Offline Signcryption Without Rnadom Oracles

Other Titles
Identity-Based Online/Offline Signcryption Without Rnadom Oracles
Authors
박승환김기탁구우권이동훈
Issue Date
2010
Publisher
한국정보보호학회
Keywords
Signcryption; Online/Offline; ID Based Cryptosystem; Signcryption; Online/Offline; ID Based Cryptosystem
Citation
정보보호학회논문지, v.20, no.5, pp.23 - 36
Indexed
KCI
Journal Title
정보보호학회논문지
Volume
20
Number
5
Start Page
23
End Page
36
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/117687
ISSN
1598-3986
Abstract
Signcryption is a cryptographic primitive which offers authentication and confidentiality simultaneously with a cost lower than signing and encrypting the message independently. We propose a new cryptographic notion called Identity-based online/offline signcryption. The notion of online/offline scheme can be divided into two phases, the first phase is performed offline prior to the arrival of a message to be signed or encrypted and the second phase is performed online phase after knowing the message and the public key of recipient. The Online phase does not require any heavy computations such as pairings or exponents. It is particularly suitable for power-constrained devices such as smart cards. In this paper, we propose ID-based signcryption scheme and ID-based online/offline signcryption scheme where the confidentiality and authenticity are simultaneously required to enable a secure and trustable communication environment. To our best knowledge, this is the first ID-based online/offline signcryption scheme that can be proven secure in the standard model.
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