MCA2CM: Multimedia Context-Aware Access Control Model

The rapid development of information systems has lead in many ways to the definition of advanced authorization and access control models. Recent models have considered context (such as time, location, age, etc.) as key issue to allow flexible and dynamic policy specification. However, these models are application-dependent, text-based, complex to manage, and insufficient to deny unauthorized access in several cases. Multimedia-based context (user surrounding snapshot, his moves and gesture, etc.) reveals interesting information which is considered of complimentary importance to textual-based context and should be considered in several scenarios while defining access control conditions. In this paper, we extend current models with Multimedia Context-Based Conditions for Access Control Models based on: flexible multimedia data description, complex and multi-criteria conditions (Mcc), and an uncertainty resolver able to reduce potential risk related to the use of multimedia data and similarity functions. Our approach is capable of enforcing current access control models and providing easy-to-use access control policies. Here we present a set of experimental tests that we have conducted to validate the proposed approach.