Abstract
Signcryption can realize the function of encryption and signature in a reasonable logic step, which can lower computational costs and communication overheads. In 2008, Selvi et al. proposed an identity-based threshold signcryption scheme. In this chapter, we show that the threshold signcryption scheme of Selvi et al. is vulnerable if the attacker can replaces the group public key. Then we point out that the receiver uses the senders’ public key without any verification in the unsigncrypt stage cause this attack.
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Yuan, W., Hu, L., Li, H., Chu, J. (2012). Analysis of Selvi et al.’s Identity-Based Threshold Signcryption Scheme. In: He, X., Hua, E., Lin, Y., Liu, X. (eds) Computer, Informatics, Cybernetics and Applications. Lecture Notes in Electrical Engineering, vol 107. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-1839-5_95
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DOI: https://doi.org/10.1007/978-94-007-1839-5_95
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