Cryptanalysis of Efficient Identity Based Signature/Signcryption Schemes in the Standard Model

Authors:
Xu An Wang;Weidong Zhong;Haining Luo
Affiliations:
-;-;-
Venue:
IPTC '10 Proceedings of the 2010 International Symposium on Intelligence Information Processing and Trusted Computing
Year:
2010

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Abstract

Efficient identity based signature/signcryption in the standard model with full security has been pursued for a long time. At ISDPE'07, Ren and Gu claimed to construct efficient identity based signature/signcryption schemes with full security in the standard model. They claimed their schemes have short public parameters, high efficiency and a tight reduction. But in this paper we give attacks to their schemes to show their schemes are not secure.