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Erschienen in:
2009 | OriginalPaper | Buchkapitel
Efficient Multi-PKG ID-Based Signcryption for Ad Hoc Networks
verfasst von : Fagen Li, Masaaki Shirase, Tsuyoshi Takagi
Erschienen in: Information Security and Cryptology
Verlag: Springer Berlin Heidelberg
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As various applications of ad hoc networks have been proposed, security has become an important research issue. ID-based signcryption is very suitable to provide security solution for ad hoc networks. In multi-domain ad hoc networks, we should use identity-based signcryption with multiple private key generators. Recently, two such schemes were proposed. However, we find that both schemes are not secure. In this paper, we propose a new identity-based signcryption with multiple private key generators. We prove its semantic security and existential unforgeability in the random oracle model. Compared with the existing two schemes, our scheme is more secure and efficient.