Generalization of the Selective-ID Security Model for HIBS Protocols

Authors:
Jin Li;Xiaofeng Chen;Fangguo Zhang;Yanming Wang
Affiliations:
School of Mathematics and Computational Science, Sun Yat-Sen University, Guangzhou, 510275, China;Department of computer Science, Sun Yat-Sen University, Guangzhou, 510275, China;Department of Electronics and Communication, Engineering, Guangzhou, 510275, China;School of Mathematics and Computational Science, Sun Yat-Sen University, Guangzhou, 510275, China and Lingnan College, Sun Yat-Sen University, Guangzhou, 510275, China
Venue:
Computational Intelligence and Security
Year:
2007

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Abstract

At PKC 2006, Chatterjee and Sarkar gave a generalization of the selective-ID security model for hierarchical identity-based encryption (HIBE). Corresponding to HIBE, in this paper, a generalization of the selective-ID security model for hierarchical identity-based signature (HIBS) is first proposed. They yield a complete generalization of the selective-ID security model for hierarchical identity-based cryptosystem. We introduce two security models which allow the adversary to commit to a set of identities and in the forgery phase choose any of the previously committed identities. Two constructions of HIBS are presented which can be proved to be secure in the two models. Furthermore, one of the HIBS schemes supports an unbounded number of levels.