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Forgeability of Wang-Zhu-Feng-Yau’s attribute-based signature with policy-and-endorsement mechanism

journal contribution
posted on 2013-07-01, 00:00 authored by A J Ge, Xinyi Huang, C Chen, C G Ma, R Zhang
Recently, Wang et al. presented a new construction of attribute-based signature with policy-and-endorsement mechanism. The existential unforgeability of their scheme was claimed to be based on the strong Diffie-Hellman assumption in the random oracle model. Unfortunately, by carefully revisiting the design and security proof of Wang et al.’s scheme, we show that their scheme cannot provide unforgeability, namely, a forger, whose attributes do not satisfy a given signing predicate, can also generate valid signatures. We also point out the flaws in Wang et al.’s proof.

History

Journal

Journal of computer science and technology

Volume

28

Issue

4

Pagination

743 - 748

Publisher

Springer-Verlag

Location

Berlin, Germany

ISSN

1860-4749

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2013, Springer

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