Cryptology ePrint Archive: BibTeX Citation of Report 2012/659

@misc{cryptoeprint:2012:659,
    author = {Hassan Jameel Asghar and Shujun Li and Ron Steinfeld and Josef Pierpzyk},
    title = {Does Counting Still Count? Revisiting the Security of Counting based User Authentication Protocols against Statistical Attacks},
    howpublished = {Cryptology ePrint Archive, Report 2012/659},
    year = {2012},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.