Cryptology ePrint Archive: BibTeX Citation of Report 2011/489

@misc{cryptoeprint:2011:489,
    author = {A. N. Alekseychuk and L. V. Kovalchuk},
    title = {Towards a Theory of Security Evaluation for GOST-like Ciphers against Differential and Linear Cryptanalysis},
    howpublished = {Cryptology ePrint Archive, Report 2011/489},
    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.