Formalising Dynamic Trust Negotiations in Decentralised Collaborative e-Health Systems

Access control in decentralised collaborative systems present huge challenges especially where many autonomous entities including organisations, 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...

• Type: Conference
• Year: 2007
• Where: IEEEARES
• Authors: Oluwafemi Ajayi, Richard O. Sinnott, Anthony Stell
• Keywords: Access Policies, IEEEARES 2007, Negotiation Strategies, Security Privacy, Trust Negotiations