Cryptology ePrint Archive: BibTeX Citation of Report 2007/198

@misc{cryptoeprint:2007:198,
    author = {Benedikt Gierlichs and Lejla Batina and Pim Tuyls},
    title = {Mutual Information Analysis -- A Universal Differential Side-Channel Attack},
    howpublished = {Cryptology ePrint Archive, Report 2007/198},
    year = {2007},
    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.