@misc{cryptoeprint:2005:361,
author = {Yuan Li and T.W.Cusick},
title = {Strict Avalanche Criterion Over Finite Fields},
howpublished = {Cryptology ePrint Archive, Report 2005/361},
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.