Cryptology ePrint Archive: BibTeX Citation of Report 2013/629

@misc{cryptoeprint:2013:629,
    author = {Ivan Damgård and Thomas P. Jakobsen and Jesper Buus Nielsen and Jakob I. Pagter},
    title = {Secure Key Management in the Cloud},
    howpublished = {Cryptology ePrint Archive, Report 2013/629},
    year = {2013},
    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.