Cryptology ePrint Archive: Report 2006/203

Generalization of the Selective-ID Security Model for HIBE Protocols

Sanjit Chatterjee and Palash Sarkar

Abstract: We generalize the selective-ID security model for HIBE by introducing two new security models. Broadly speaking, both these models allow the adversary to commit to a set of identities and in the challenge phase choose any one of the previously committed identities. Two constructions of HIBE are presented which are secure in the two models. Further, we show that the HIBEs can be modified to obtain a multiple receiver IBE which is secure in the selective-ID model without the random oracle assumption.

Category / Keywords: public-key cryptography /

Publication Info: A previous version of the paper has been published as part of the proceedings of PKC 2006

Date: received 20 Jun 2006

Contact author: palash at isical ac in

Available formats: Postscript (PS) | Compressed Postscript (PS.GZ) | PDF | BibTeX Citation

Note: 20 June 2006: This version provides more details about the models, constructions and proofs than the PKC 2006 version.

Version: 20060620:171930 (All versions of this report)

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