Hierarchical Identity-based Chameleon Hash and Its Applications
Conference Proceeding Article
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.
Chameleon Hash, Trapdoor Sanitizable Signature, Hierarchical Identity-Based Chameleon Hash, Hierarchical Trapdoor Sanitizable Signature
Intelligent Systems and Decision Analytics
Applied Cryptography and Network Security: 9th International Conference, ACNS 2011, Nerja, Spain, June 7-10: Proceedings
City or Country
BAO, Feng; DENG, Robert H.; DING, Xuhua; Lai, Junzuo; and ZHAO, Yunlei.
Hierarchical Identity-based Chameleon Hash and Its Applications. (2011). Applied Cryptography and Network Security: 9th International Conference, ACNS 2011, Nerja, Spain, June 7-10: Proceedings. 6715, 201-219. Research Collection School Of Information Systems.
Available at: http://ink.library.smu.edu.sg/sis_research/1417