@misc{cryptoeprint:2009:554,
author = {T. W. CUSICK, YUAN LI AND PANTELIMON STANICA},
title = {ON A COMBINATORIAL CONJECTURE},
howpublished = {Cryptology ePrint Archive, Report 2009/554},
year = {2009},
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.