@misc{cryptoeprint:2014:086,
author = {Wei Jiang, Dan Lin, Feng Li, Elisa Bertino},
title = {Randomized and Efficient Authentication in Mobile Environments},
howpublished = {Cryptology ePrint Archive, Report 2014/086},
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.