Cryptology ePrint Archive: BibTeX Citation of Report 2014/621

@misc{cryptoeprint:2014:621,
    author = {Michael Backes and Aniket Kate and Sebastian Meiser and Esfandiar Mohammadi},
    title = {(Nothing else) MATor(s): Monitoring the Anonymity of Tor's Path Selection},
    howpublished = {Cryptology ePrint Archive, Report 2014/621},
    year = {2014},
    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.