Cryptology ePrint Archive: BibTeX Citation of Report 2014/422

@misc{cryptoeprint:2014:422,
    author = {Gilles Barthe and Gustavo Betarte and Juan Diego Campo and Carlos Luna and David Pichardie},
    title = {System-level non-interference for constant-time cryptography},
    howpublished = {Cryptology ePrint Archive, Report 2014/422},
    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.