Cryptology ePrint Archive: BibTeX Citation of Report 2007/237

@misc{cryptoeprint:2007:237,
    author = {Marek Klonowski and Miros\l{}aw Kuty\l{}owski and Micha\l{} Ren and Katarzyna Rybarczyk},
    title = {Forward-secure Key Evolution in Wireless Sensor Networks},
    howpublished = {Cryptology ePrint Archive, Report 2007/237},
    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.