Atsuko Miyaji Masahiro Sukegawa New Correlations of RC4 PRGA Using Nonzero-Bit Differences. 134-152 2009 ACISP http://dx.doi.org/10.1007/978-3-642-02620-1_10 conf/acisp/2009 db/conf/acisp/acisp2009.html#MiyajiS09