Cryptology ePrint Archive: BibTeX Citation of Report 2014/134

@misc{cryptoeprint:2014:134,
    author = {Daniel J. Bernstein and Chitchanok Chuengsatiansup and Tanja Lange and Peter Schwabe},
    title = {Kummer strikes back: new DH speed records},
    howpublished = {Cryptology ePrint Archive, Report 2014/134},
    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.