Cryptology ePrint Archive: BibTeX Citation of Report 2012/432

@misc{cryptoeprint:2012:432,
    author = {Alex Biryukov, Ivan Pustogarov, Ralf-Philipp Weinmann},
    title = {TorScan: Tracing Long-lived Connections and Differential Scanning Attacks},
    howpublished = {Cryptology ePrint Archive, Report 2012/432},
    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.