ABAC Policies Mining by Complex Networks Analysis Techniques

Recent computing technologies and modern information systems require an access control model that provides flexibility, granularity, and dynamism. The Attribute-Based Access Control (ABAC) model was developed to address the new challenges of emerging applications. Designing and implementing an ABAC policy manually is usually a complex and costly task; therefore, many organizations prefer to keep their access control mechanisms in operation rather than incur the costs associated with the migration process. A solution to the above is to automate the process of creating access control policies. This action is known as policy mining. In this paper, we present a novel approach, based on complex network analysis, for mining an ABAC policy from an access control log. The proposed approach is based on the data and the relationships that can be generated from them. The proposed methodology is divided into five phases: 1) data preprocessing, 2) network model, 3) community detection, 4) policy rules extraction, and 5) policy refinement. The results show that it is possible to obtain an ABAC policy using the approach based on complex networks. In addition, our proposed methodology outperforms existing ABAC mining algorithms in terms of quality. Finally, we present a novel access decision process that reduces the number of rules to evaluate based on a rule network.