Tr-OrBAC: A trust model for collaborative systems within critical infrastructures

In last decades, the notion of collaborative systems is presented as the new concept in Critical Infrastructures. It regroups different organizations collaborating in order to ensure the continuity of these infrastructures. However, some malicious behavior can arise causing perturbations on the information systems of the organizations. To avoid this behavior, building trust between collaborating organizations is necessary; it allows cooperating and sharing resources in a secure way. In this paper, we present Tr-OrBAC: a new trust model applicable in collaborative systems; it is based on the OrBAC (Organization Based Access Control) access control model and trust evaluation. In this paper, we will focus on explaining and detailing the proposed trust model.