@misc{cryptoeprint:2012:025,
author = {Xiangtao Yan and Yifa Li},
title = {A new remote data integrity checking scheme for cloud storage},
howpublished = {Cryptology ePrint Archive, Report 2012/025},
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.