Cryptology ePrint Archive: BibTeX Citation of Report 2010/206

@misc{cryptoeprint:2010:206,
    author = {Long Hoang Nguyen and Andrew William Roscoe},
    title = {Authentication protocols based on low-bandwidth unspoofable channels: a comparative survey},
    howpublished = {Cryptology ePrint Archive, Report 2010/206},
    year = {2010},
    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.