@misc{cryptoeprint:2013:341,
author = {Fabrice Benhamouda and David Pointcheval},
title = {Trapdoor Smooth Projective Hash Functions},
howpublished = {Cryptology ePrint Archive, Report 2013/341},
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.