Cryptology ePrint Archive: BibTeX Citation of Report 2015/683

@misc{cryptoeprint:2015:683,
    author = {Irene Giacomelli and Ruxandra F. Olimid and Samuel Ranellucci},
    title = {Security of Linear Secret-Sharing Schemes against Mass Surveillance},
    howpublished = {Cryptology ePrint Archive, Report 2015/683},
    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.