@misc{cryptoeprint:2011:269,
author = {Mihir Bellare and Sriram Keelveedhi},
title = {Authenticated and Misuse-Resistant Encryption of Key-Dependent Data},
howpublished = {Cryptology ePrint Archive, Report 2011/269},
year = {2011},
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.