Cryptology ePrint Archive: BibTeX Citation of Report 2014/895

@misc{cryptoeprint:2014:895,
    author = {Kerry A. McKay and Poorvi L. Vora},
    title = {Analysis of ARX Functions: Pseudo-linear Methods for Approximation, Differentials, and Evaluating Diffusion},
    howpublished = {Cryptology ePrint Archive, Report 2014/895},
    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.