@misc{cryptoeprint:2013:133,
author = {Hemlata Nagesh and Birendra Kumar Sharma},
title = {New Lattice Based Signature Using The Jordan Normal Form},
howpublished = {Cryptology ePrint Archive, Report 2013/133},
year = {2013},
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.