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Erschienen in:
2005 | OriginalPaper | Buchkapitel
Efficient Identity-Based Signatures and Blind Signatures
verfasst von : Zhenjie Huang, Kefei Chen, Yumin Wang
Erschienen in: Cryptology and Network Security
Verlag: Springer Berlin Heidelberg
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In this paper, we first propose an efficient provably secure identity-based signature (IBS) scheme based on bilinear pairings, then propose an efficient identity-based blind signature (IBBS) scheme based on our IBS scheme. Assuming the intractability of the Computational Diffie-Hellman Problem, our IBS scheme is unforgeable under adaptive chosen-message and ID attack. Efficiency analyses show that our schemes can offer advantages in runtime over the schemes available. Furthermore, we show that, contrary to the authors claimed, Zhang and Kim’s scheme in ACISP 2003 is one-more forgeable, if the ROS-problem is solvable.