@misc{cryptoeprint:2014:533,
author = {Jaiganesh Balasundaram},
title = {Indifferentiability Results and Proofs for Some Popular Cryptographic Constructions},
howpublished = {Cryptology ePrint Archive, Report 2014/533},
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.