@misc{cryptoeprint:2008:307,
author = {Liming Fang and Jinyue Xia},
title = {Full Security:Fuzzy Identity Based Encryption},
howpublished = {Cryptology ePrint Archive, Report 2008/307},
year = {2008},
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.