@misc{cryptoeprint:2013:694,
author = {Lichun Li and Anwitaman Datta},
title = {Write-Only Oblivious RAM based Privacy-Preserved Access of Outsourced Data},
howpublished = {Cryptology ePrint Archive, Report 2013/694},
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.