@misc{cryptoeprint:2015:1152,
    author = {Qiang Tang and Jun Wang},
    title = {Privacy-preserving Friendship-based Recommender Systems},
    howpublished = {Cryptology ePrint Archive, Report 2015/1152},
    year = {2015},
    url = {https://eprint.iacr.org/2015/1152},
}