@misc{cryptoeprint:2014:651,
author = {Pavol Zajac},
title = {A note on CCA2-protected McEliece Cryptosystem with a systematic public key},
howpublished = {Cryptology ePrint Archive, Report 2014/651},
year = {2014},
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.