@misc{cryptoeprint:2008:410,
    author = {Xu an Wang  and  Xiaoyuan Yang },
    title = {On the Role of KGC for Proxy Re-encryption in Identity Based Setting},
    howpublished = {Cryptology ePrint Archive, Report 2008/410},
    year = {2008},
    url = {http://eprint.iacr.org/2008/410},
}