Cryptology ePrint Archive: BibTeX Citation of Report 2015/425

@misc{cryptoeprint:2015:425,
    author = {Stefan Heyse and Ingo von Maurich and Tim Güneysu},
    title = {Smaller Keys for Code-Based Cryptography: QC-MDPC McEliece Implementations on Embedded Devices},
    howpublished = {Cryptology ePrint Archive, Report 2015/425},
    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.