Fatemeh Raji, Ali Miri, Mohammad Davarpanah Jazi and Behzad Malek DEFF: a new architecture for private online social networks Security and Communication Networks 6
In this paper, we propose a mediated architecture for OSNs that protects users' information from both the OSN provider and unauthorized OSN users. Our proposed approach delegates most of the computation tasks to a semi-trusted proxy server. We exploit a simplified broadcast encryption method in order to design a dynamic, efficient, flexible, and fine-grained (DEFF) control system. In the proposed DEFF system, users are allowed to cryptographically categorize their friends into different relations and to share data with arbitrary groups of them.
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