@misc{cryptoeprint:2010:129,
author = {N. Rajesh Pillai, S. S. Bedi, Sanjay Kumar, Roopika Chaudhary},
title = {Relation for Algebraic Attack on E0 combiner},
howpublished = {Cryptology ePrint Archive, Report 2010/129},
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.