Cryptology ePrint Archive: BibTeX Citation of Report 2015/455

@misc{cryptoeprint:2015:455,
    author = {Jian Liu and N.Asokan and Benny Pinkas},
    title = {Secure Deduplication of Encrypted Data without Additional Independent Servers},
    howpublished = {Cryptology ePrint Archive, Report 2015/455},
    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.