@misc{cryptoeprint:2010:446,
author = {G.M. Zaverucha and D.R. Stinson},
title = {Short One-Time Signatures},
howpublished = {Cryptology ePrint Archive, Report 2010/446},
year = {2010},
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.