@misc{cryptoeprint:2010:297,
author = {Amir Moradi and Oliver Mischke and Thomas Eisenbarth},
title = {Correlation-Enhanced Power Analysis Collision Attack},
howpublished = {Cryptology ePrint Archive, Report 2010/297},
year = {2010},
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.