New Construction of Short Hierarchical ID-Based Signature in the Standard Model

Authors:
Leyou Zhang;Yupu Hu;Qing Wu
Affiliations:
(Correspd.) Department of Mathematical Science, Xidian University, XI'AN, ShaanXi Province 710071, China. leyouzhang77@yahoo.com.cn;Key Laboratory of Computer Networks and Information Security, Xidian University, XI'AN, ShaanXi Province 710071, China;Department of Mathematical Science, Xidian University, XI'AN, ShaanXi Province 710071, China
Venue:
Fundamenta Informaticae
Year:
2009

Citing 12
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Abstract

In this paper, a new construction of hierarchical ID-Based signature (HIBS) scheme is proposed. The new scheme has some advantages over the available schemes: the private keys size shrinks as the identity depth increases and the signature size is a constant as it consists of three group elements. Furthermore, under the h-CDH assumption, our scheme is provably secure in the standard model. This assumption is more natural than many of the hardness assumptions recently introduced to HIBS in the standard model.