@misc{cryptoeprint:2005:458,
author = {James A. Muir},
title = {Seifert's RSA Fault Attack: Simplified Analysis and Generalizations},
howpublished = {Cryptology ePrint Archive, Report 2005/458},
year = {2005},
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.