Efficient Multi-PKG ID-Based Signcryption for Ad Hoc Networks

Authors:
Fagen Li;Masaaki Shirase;Tsuyoshi Takagi
Affiliations:
School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China 610054 and State Key Laboratory of Information Security, Graduate School of Chi ...;School of Systems Information Science, Future University-Hakodate, Hakodate, Japan 041-8655;School of Systems Information Science, Future University-Hakodate, Hakodate, Japan 041-8655
Venue:
Information Security and Cryptology
Year:
2009

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Abstract

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.