Cryptology ePrint Archive: BibTeX Citation of Report 2010/498

@misc{cryptoeprint:2010:498,
    author = {Vladislav Kovtun, Sergey Kavun},
    title = {Co-Z Divisor Addition Formulae in Jacobian of Genus 2 Hyperelliptic Curves over Prime Fields},
    howpublished = {Cryptology ePrint Archive, Report 2010/498},
    year = {2010},
    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.