@misc{cryptoeprint:2011:512,
author = {Benny Applebaum and Andrej Bogdanov and Alon Rosen},
title = {A Dichotomy for Local Small-Bias Generators},
howpublished = {Cryptology ePrint Archive, Report 2011/512},
year = {2011},
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.