@misc{cryptoeprint:2011:481,
author = {Pierre-Alain Fouque and Mehdi Tibouchi},
title = {Close to Uniform Prime Number Generation With Fewer Random Bits},
howpublished = {Cryptology ePrint Archive, Report 2011/481},
year = {2011},
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.