@misc{cryptoeprint:2007:132,
author = {Aggelos Kiayias and Hong-Sheng Zhou},
title = {Equivocal Blind Signatures and Adaptive UC-Security},
howpublished = {Cryptology ePrint Archive, Report 2007/132},
year = {2007},
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.