Proceedings of the 2nd international conference on Security of information and networks
RAR: A role-and-risk based flexible framework for secure collaboration
Future Generation Computer Systems
Extracting trust information from security system of a service
Journal of Network and Computer Applications
Modeling collaborative task execution in social networks
Proceedings of the CUBE International Information Technology Conference
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The increasing complexity and dynamics of grid environments have posed great challenges for secure and privacy-preserving collaboration in a virtual organization. In this paper, we propose PEACE-VO, a secure policy-enabled collaboration framework for virtual organizations. PEACE-VO employs role mapping to define trust relationships across autonomous domains. Nevertheless, a critical issue emerges when the system applies role mapping, which is potential policy conflict in a local domain. We first develop two concepts to depict such possible conflicts within the collaboration policy. Next, we propose a fully distributed evaluation algorithm to detect potential policy conflicts, which does not require domains to disclose their full local security policies and therefore preserves critical domain privacy. Finally, we design two dedicated protocols for virtual organization management and authorization services, respectively. We have successfully implemented the PEACE-VO framework with two fundamental protocols, i.e., VO management protocol and service authorization protocol, in the CROWN Grid. Comprehensive experimental study shows our approach is scalable and efficient.