Signcryption is a new cryptographic primitive that performs signing and encryption simultaneously, at a cost significantly lower than that required by the traditional signature-then-encryption approach. In this paper, we present a security analysis of two such schemes: the Huang-Chang convertible signcryption scheme [12], and the Kwak-Moon group signcryption scheme [13]. Our results show that both schemes are insecure. Specifically, the Huang-Chang scheme fails to provide confidentiality, while the Kwak-Moon scheme does not satisfy the properties of unforgeability, coalition-resistance, and traceability. Keywords: Signcryption, digital signature, encryption. © Springer-Verlag 2004.
CITATION STYLE
Wang, G., Deng, R. H., Kwak, D., & Moon, S. (2004). Security analysis of two signcryption schemes. Lecture Notes in Computer Science (Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 3225, 123–133. https://doi.org/10.1007/978-3-540-30144-8_11
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