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12259 Inter-domain Identity-based Proxy Re-encryption
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Tang, Qiang and Hartel, P.H. and Jonker, W. (2008) Inter-domain Identity-based Proxy Re-encryption. Technical Report TR-CTIT-08-32, Centre for Telematics and Information Technology University of Twente, Enschede. ISSN 1381-3625

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Abstract

Proxy re-encryption is a cryptographic primitive developed to
delegate the decryption right from one party (the delegator) to
another (the delegatee). So far, no particular research efforts have
been devoted to this primitive in the inter-domain identity-based
setting, where the delegator and the delegatee are registered at
different domains. In this paper we analyze the trust relationships
and possible threats to the plaintexts of both the delegator and the
delegatee in this setting, and provide game-based semantic security
definitions. We propose a new inter-domain identity-based proxy
re-encryption scheme and prove its security in our security model.
An interesting property of our scheme is that, to achieve the chosen
plaintext security for the delegator, the delegatee's IBE only needs
to be one-way.

Item Type:Internal Report (Technical Report)
Research Group:EWI-DIES: Distributed and Embedded Security, EWI-DB: Databases
Research Program:CTIT-ISTRICE: Integrated Security and Privacy in a Networked World
Research Project:SPCMHD: Secure Patient-Centric Management of Health Data
ID Code:12259
Deposited On:15 April 2008
More Information:statisticsmetis

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