Journal
INFORMATION SCIENCES
Volume 181, Issue 3, Pages 661-667Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ins.2010.09.037
Keywords
Certificateless signcryption; Malicious-but-passive KGC attack; Semantic security; Existential unforgeability
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Funding
- National Science Foundation of China [60903178, 61005049]
- National High Technology Research and Development Program of China (863 Program) [2008AA01Z403]
- Fundamental Research Funds for the Central Universities
- Office of Research, Singapore Management University
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Certificateless signcryption is a useful primitive which simultaneously provides the functionalities of certificateless encryption and certificateless signature. Recently, Liu et al. 1151 proposed a new certificateless signcryption scheme, and claimed that their scheme is provably secure without random oracles in a strengthened security model, where the malicious-but-passive KGC attack is considered. Unfortunately, by giving concrete attacks, we indicate that Liu et al. certificateless signcryption scheme is not secure in this strengthened security model. (C) 2010 Elsevier Inc. All rights reserved.
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