Cryptology ePrint Archive: Report 2010/491

A Collaborative Framework for Privacy Protection in Online Social Networks

Yan Zhu and Zexing Hu and Huaixi Wang and Hongxin Hu and Gail-Joon Ahn

Abstract: With the wide use of online social networks (OSNs), the problem of data privacy has attracted much attention. Several approaches have been proposed to address this issue. One of privacy management approaches for OSN leverages a key management technique to enable a user to simply post encrypted contents so that only users who can satisfy the associate security policy can derive the key to access the data. However, the key management policies of existing schemes may grant access to unaurhorized users and cannot efficiently determine authorized users. In this paper, we propose a collaborative framework which enforces access control for OSN through an innovative key management focused on communities. This framework introduces a community key management based on a new group-oriented convergence cryptosystem, as well as provides an efficient privacy preservation

needed in a private OSN. To prove the feasibility of our approach, we also discuss a proof-of-concept implementation of our framework. Experimental results show that our

construction can achieve the identified design goals for OSNs with the acceptable performance.

Category / Keywords: applications / Cryptography, Access Control, Social Network, Convergence

Publication Info: The 6th International Conference on Collaborative Computing: Networking, Applications and Worksharing, 2010

Date: received 17 Sep 2010

Contact author: yan zhu at pku edu cn

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Version: 20100919:183922 (All versions of this report)

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