@misc{cryptoeprint:2009:082,
author = {Douglas Stebila and Michele Mosca and Norbert L\"utkenhaus},
title = {The Case for Quantum Key Distribution},
howpublished = {Cryptology ePrint Archive, Report 2009/082},
year = {2009},
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.