@misc{cryptoeprint:2012:581,
    author = {Ding Wang and Chun-guang Ma},
    title = {On the security of two smart-card-based remote user authentication schemes for WSN},
    howpublished = {Cryptology ePrint Archive, Report 2012/581},
    year = {2012},
    url = {http://eprint.iacr.org/2012/581},
}