Cryptology ePrint Archive: BibTeX Citation of Report 2015/908

@misc{cryptoeprint:2015:908,
    author = {Martin M. Lauridsen and Christian Rechberger},
    title = {Linear Distinguishers in the Key-less Setting: Application to PRESENT},
    howpublished = {Cryptology ePrint Archive, Report 2015/908},
    year = {2015},
    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.