@misc{cryptoeprint:2004:043,
author = {Xiutao Feng, Quanlong Wang and Zongduo Dai},
title = {Multi-sequences with d-perfect property},
howpublished = {Cryptology ePrint Archive, Report 2004/043},
year = {2004},
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.