Cryptology ePrint Archive: BibTeX Citation of Report 2015/977

@misc{cryptoeprint:2015:977,
    author = {Michał Wroński},
    title = {Faster point scalar multiplication on NIST elliptic curves over GF(p) using (twisted) Edwards curves over GF(p³)},
    howpublished = {Cryptology ePrint Archive, Report 2015/977},
    year = {2015},
    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.