@misc{cryptoeprint:2012:268,
author = {Edoardo Persichetti},
title = {On a CCA2-secure variant of McEliece in the standard model},
howpublished = {Cryptology ePrint Archive, Report 2012/268},
year = {2012},
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.