Publication Type

Conference Proceeding Article

Version

publishedVersion

Publication Date

6-2011

Abstract

At ACNS 2008, Canard et al. introduced the notion of trapdoor sanitizable signature (TSS) based on identity-based chameleon hash (IBCH). Trapdoor sanitizable signatures allow the signer of a message to delegate, at any time, the power of sanitization to possibly several entities who can modify predetermined parts of the message and generate a new signature on the sanitized message without interacting with the original signer. In this paper, we introduce the notion of hierarchical identity-based chameleon hash (HIBCH), which is a hierarchical extension of IBCH. We show that HIBCH can be used to construct other cryptographic primitives, including hierarchical trapdoor sanitizable signature (HTSS) and key-exposure free IBCH. HTSS allows an entity who has the sanitization power for a given signed message, to further delegate its power to its descendants in a controlled manner. Finally, we propose a concrete construction of HIBCH and show that it is t-threshold collusion-resistant.

Keywords

Chameleon Hash, Trapdoor Sanitizable Signature, Hierarchical Identity-Based Chameleon Hash, Hierarchical Trapdoor Sanitizable Signature

Discipline

Information Security

Research Areas

Cybersecurity

Publication

Applied Cryptography and Network Security: 9th International Conference, ACNS 2011, Nerja, Spain, June 7-10: Proceedings

Volume

6715

First Page

201

Last Page

219

ISBN

9783642215544

Identifier

10.1007/978-3-642-21554-4_12

Publisher

Springer

City or Country

Cham

Copyright Owner and License

Publisher

Additional URL

https://doi.org/10.1007/978-3-642-21554-4_12

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