@misc{cryptoeprint:2013:456,
    author = {Purushothama B R and  B B Amberker},
    title = {On the Security of Group-based Proxy Re-encryption Scheme},
    howpublished = {Cryptology ePrint Archive, Report 2013/456},
    year = {2013},
    url = {https://eprint.iacr.org/2013/456},
}