@misc{cryptoeprint:2013:514,
author = {Jia Xu and Jianying Zhou},
title = {Leakage Resilient Proofs of Ownership in Cloud Storage, Revisited},
howpublished = {Cryptology ePrint Archive, Report 2013/514},
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.