@misc{cryptoeprint:2002:014,
author = {Leonid Reyzin and Natan Reyzin},
title = {Better than BiBa: Short One-time Signatures with Fast Signing and Verifying},
howpublished = {Cryptology ePrint Archive, Report 2002/014},
year = {2002},
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.