@misc{cryptoeprint:2001:100,
author = {Shahrokh Saeednia},
title = {A Note on Girault's Self-Certified Model},
howpublished = {Cryptology ePrint Archive, Report 2001/100},
year = {2001},
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.