@misc{cryptoeprint:2000:058,
author = {Sara Miner and Jessica Staddon},
title = {Graph-Based Authentication of Digital Streams},
howpublished = {Cryptology ePrint Archive, Report 2000/058},
year = {2000},
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.