@misc{cryptoeprint:2005:201,
    author = {Zhaohui Cheng and Liqun Chen},
    title = {On Security Proof of McCullagh-Barreto's Key Agreement Protocol and its Variants},
    howpublished = {Cryptology ePrint Archive, Report 2005/201},
    year = {2005},
    url = {http://eprint.iacr.org/2005/201},
}