@misc{cryptoeprint:2005:374,
author = {Kunpeng Wang, Bao Li},
title = {Computation of Tate Pairing for Supersingular Curves over characteristic 5 and 7},
howpublished = {Cryptology ePrint Archive, Report 2005/374},
year = {2005},
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.