@misc{cryptoeprint:2015:619,
author = {Seher Tutdere and Osmanbey Uzunkol},
title = {Construction of Arithmetic Secret Sharing Schemes by Using Torsion Limits},
howpublished = {Cryptology ePrint Archive, Report 2015/619},
year = {2015},
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.