Cryptology ePrint Archive: BibTeX Citation of Report 2009/234

@misc{cryptoeprint:2009:234,
    author = {Rune Steinsmo \Oe deg\aa rd and Danilo Gligoroski},
    title = {On the Randomness and Regularity of Reduced EDON-$\mathcal{R}$ Compression Function},
    howpublished = {Cryptology ePrint Archive, Report 2009/234},
    year = {2009},
    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.