@misc{cryptoeprint:2006:059,
author = {R. Granger and D. Page and N.P. Smart},
title = {High Security Pairing-Based Cryptography Revisited},
howpublished = {Cryptology ePrint Archive, Report 2006/059},
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.