@misc{cryptoeprint:2010:491,
    author = {Yan Zhu and Zexing Hu and Huaixi Wang and Hongxin Hu and Gail-Joon Ahn},
    title = {A Collaborative Framework for Privacy Protection in Online Social Networks},
    howpublished = {Cryptology ePrint Archive, Report 2010/491},
    year = {2010},
    url = {http://eprint.iacr.org/2010/491},
}