International Journal of Emerging Technology and Advanced Engineering (IJETAE)
Online Social Networks (OSNs) have experienced tremendous growth in recent years and become a de facto portal for hundreds of millions of Internet users. Users of these sites form a social network, which provides a powerful means of sharing, organizing and finding content and contacts. But, it raises number of security and privacy issues. Today's OSNs allow users have little control on the unwanted messages displayed on their walls and restrict access to shared data but, OSNs does not provide any mechanism to enforce privacy concerns over data associated with multiple users.