@misc{cryptoeprint:2013:053,
author = {Yinxia Sun and Futai Zhang and Limin Shen and Robert H. Deng},
title = {A revocable certificateless signature scheme},
howpublished = {Cryptology ePrint Archive, Report 2013/053},
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.