@misc{cryptoeprint:2007:047,
author = {Joonsang Baek and Willy Susilo and Jianying Zhou},
title = {New Constructions of Fuzzy Identity-Based Encryption},
howpublished = {Cryptology ePrint Archive, Report 2007/047},
year = {2007},
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.