@misc{cryptoeprint:2012:301,
author = {Myungsun Kim and Jinsu Kim and Jung Hee Cheon},
title = {A Public Shuffle without Private Permutations},
howpublished = {Cryptology ePrint Archive, Report 2012/301},
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.