Restricting data-leakage using fine-grained access control on OSN objects

In recent years, Online Social Networks like Facebook, Twitter have become an integral part of our daily life to share a variety of information with others. These information contents are accessible to a large group of Internet users causing a serious privacy risk. In this paper, we propose a simple and flexible access control model to regulate access to users' resources on Twitter. Our proposed model employs an object matrix and access capability list to enable users to regulate access to their private resources and can be tuned to other Online Social Networks. The main advantages of our model are its simplicity and ease of deployment. The correctness of the access control model is verified using a logical model in Answer Set Programming. The efficiency and feasibility of our mechanism is evaluated through a prototype.