@misc{cryptoeprint:2013:006,
    author = {Qingfeng Cheng},
    title = {Cryptanalysis of a pairing-free identity-based authenticated group key agreement protocol for imbalanced mobile networks},
    howpublished = {Cryptology ePrint Archive, Report 2013/006},
    year = {2013},
    url = {http://eprint.iacr.org/2013/006},
}