Towards a session based OrBAC model

A collaborative system allows a group of users to collaborate through a distributed platform in order to perform a common task. These users may have concurrent access to shared objects. In this context, access control becomes an important issue that must be addressed. Access control models are designed to protect shared information and resources, of any type and at different levels of granularity. In this work we present SOrBAC: an extension of OrBAC model, in order to provide a mechanism for securing a dynamic collaborative Session. SOrBAC introduces a new level named Session level to the original OrBAC model. This session level introduces new entities to allow a dynamic access control during a collaborative session.