Preserving Secrecy in Online Social Networks: Data Outsourcing, Access Control, and Secrecy Schemes

Abstract:

In the last years, Online Social Networks (OSNs) like Facebook and Foursquare have become a popular way to communicate and share information between users. OSNs are virtual communities, which contain information about the users and the relationships existing between them, eg, friends. In addition to allowing interaction between users, OSNs usually offer different kinds of services to their users, eg, querying friends within a given distance. To be able to access these services, users may be required to store in the OSN systems a variety of information such as their physical positions. Since most of the information stored in OSNs about their users is private, it is essential to protect the information from unauthorized access to avoid secrecy issues. For this purpose, OSNs use access control systems. These systems have three main components, namely, access control policies, access control model, and authorization mechanism. The access policies allow users to specify who can access their resources. The access control model provides the syntax and semantics to formalize access control policies. The formal representation of access control policies in an access control model are called authorizations. The authorization mechanism, which is managed by the OSN providers, enforce the authorizations. Although different access control systems have been proposed in the literature, there are two main open issues concerning these systems that can influence the spread of OSNs. The first issue is related to the flexibility of access control models. One of the major challenges of OSNs is to promote information sharing among their users. Users usually …

Año de publicación:

2020

Keywords:

Fuente:

google