@misc{cryptoeprint:2012:047,
author = {Ilya Mironov and Omkant Pandey and Omer Reingold and Gil Segev},
title = {Incremental Deterministic Public-Key Encryption},
howpublished = {Cryptology ePrint Archive, Report 2012/047},
year = {2012},
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.