@misc{cryptoeprint:2006:468,
author = {Julien Bringer and Herve Chabanne and Emmanuelle Dottax},
title = {White Box Cryptography: Another Attempt},
howpublished = {Cryptology ePrint Archive, Report 2006/468},
year = {2006},
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.