@misc{cryptoeprint:2005:197,
    author = {Qiang Tang and Liqun Chen},
    title = {Weaknesses in two group Diffie-Hellman key exchange protocols},
    howpublished = {Cryptology ePrint Archive, Report 2005/197},
    year = {2005},
    url = {http://eprint.iacr.org/2005/197},
}