NDLI: Formalising Dynamic Trust Negotiations in Decentralised Collaborative e-Health Systems

Content Provider	IEEE Xplore Digital Library
Author	Ajayi, O. Sinnott, R. Stell, A.
Copyright Year	2007
Description	Author affiliation: National e-Sci. Centre, Glasgow Univ. (Ajayi, O.; Sinnott, R.; Stell, A.)
Abstract	Access control in decentralised collaborative systems present huge challenges especially where many autonomous entities including organizations, humans, software agents from different security domains seek to access and share resources in a secure and controlled way. Automated trust negotiation (ATN) is one approach that has been proposed for trust discovery and realisation, which enables entities viz. strangers to access resources across autonomous boundaries through iterative exchange of credentials. Various negotiation strategies have been proposed to protect credential disclosure during trust negotiations. However in some domains such as e-health, not all entities are willing to negotiate credentials or disclose access policies directly to strangers regardless of negotiation strategies and instead prefer to negotiate and disclose sensitive information only to strangers within what we refer to as a circle of trust. In this paper, we introduce a formal model to describe how locally trusted intermediary parties can provide multiple negotiation and delegations hops to protect credentials and access policies. We propose a dynamic trust negotiations (DTN) model that not only protects sensitive information from disclosure but also reduces semantic issues that exist with credentials in decentralized systems. This work is currently being explored and implemented within the e-health domain: specifically in the MRC-funded Virtual Organisation for Trials of Epidemiological Studies (VOTES) project
Sponsorship	ENISA Vienna Univ. of Technol. Secure Business Austria Austrian Comput. Soc
Starting Page	3
Ending Page	10
File Size	463040
Page Count	8
File Format	PDF
ISBN	0769527752
DOI	10.1109/ARES.2007.91
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-04-10
Publisher Place	Austria
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Access control Collaborative software Collaboration Humans Automatic control Control systems Software agents Security Iterative methods Protection
Content Type	Text
Resource Type	Article

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