@misc{cryptoeprint:2014:225,
author = {Tapas Pandit and Rana Barua},
title = {Adaptively Secure Functional Encryption for Finite Languages from DLIN Assumption},
howpublished = {Cryptology ePrint Archive, Report 2014/225},
year = {2014},
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.