@misc{cryptoeprint:2014:779,
author = {Daniel Apon, Yan Huang, Jonathan Katz, Alex J. Malozemoff},
title = {Implementing Cryptographic Program Obfuscation},
howpublished = {Cryptology ePrint Archive, Report 2014/779},
year = {2014},
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.