@misc{cryptoeprint:2003:041,
author = {Jovan Dj. Golic and Renato Menicocci},
title = {A new statistical distinguisher for the shrinking generator},
howpublished = {Cryptology ePrint Archive, Report 2003/041},
year = {2003},
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.