Distributed Authorization by Multiparty Trust Negotiation
Identifieur interne : 000C57 ( Main/Merge ); précédent : 000C56; suivant : 000C58Distributed Authorization by Multiparty Trust Negotiation
Auteurs : C. Zhang [États-Unis] ; Marianne Winslett [États-Unis]Source :
- Lecture Notes in Computer Science [ 0302-9743 ] ; 2008.
Abstract
Abstract: Automated trust negotiation (ATN) is a promising approach to establishing trust between two entities without any prior knowledge of each other. However, real-world authorization processes often involve online input from third parties, which ATN does not support. In this paper, we introduce multiparty trust negotiation (MTN) as a new approach to distributed authorization. We define a Datalog-based policy language, Distributed Authorization and Release Control Logic (DARCL), to specify both authorization and release control policies. DARCL suits the needs of MTN and can also serve as a powerful general-purpose policy language for authorization. To orchestrate the negotiation process among multiple parties without a centralized moderator, we propose the diffusion negotiation protocol, a set of message-passing conventions that allows parties to carry out a negotiation in a distributed fashion. Building on top of the diffusion negotiation protocol, we propose two negotiation strategies, both safe and complete, to drive MTN with different tradeoffs between privacy and negotiation speed.
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DOI: 10.1007/978-3-540-88313-5_19
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