@misc{cryptoeprint:2013:307,
author = {Rafail Ostrovsky and Anat Paskin-Cherniavsky and Beni Paskin-Cherniavsky},
title = {Maliciously Circuit-Private FHE},
howpublished = {Cryptology ePrint Archive, Report 2013/307},
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.