Cryptology ePrint Archive: BibTeX Citation of Report 2010/596

@misc{cryptoeprint:2010:596,
    author = {Enrico Thomae and Christopher Wolf},
    title = {Solving Systems of Multivariate Quadratic Equations over Finite Fields or: From Relinearization to MutantXL},
    howpublished = {Cryptology ePrint Archive, Report 2010/596},
    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.