@misc{cryptoeprint:2004:018,
author = {Song-Ju Kim and Ken Umeno and Akio Hasegawa},
title = {Corrections of the NIST Statistical Test Suite for Randomness},
howpublished = {Cryptology ePrint Archive, Report 2004/018},
year = {2004},
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.