@misc{cryptoeprint:2014:679,
author = {Zhengjun Cao and Lihua Liu},
title = {A Note on the Bellare-Rivest Protocol for Translucent Cryptography},
howpublished = {Cryptology ePrint Archive, Report 2014/679},
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.