@misc{cryptoeprint:2015:133,
author = {Kristin Lauter and Adriana Lopez-Alt and Michael Naehrig},
title = {Private Computation on Encrypted Genomic Data},
howpublished = {Cryptology ePrint Archive, Report 2015/133},
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.