@misc{cryptoeprint:2010:280,
author = {Arpita Patra},
title = {Studies on Verifiable Secret Sharing, Byzantine Agreement and Multiparty Computation},
howpublished = {Cryptology ePrint Archive, Report 2010/280},
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.