Olivier Billet Henri Gilbert Resistance of SNOW 2.0 Against Algebraic Attacks. 19-28 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3376&spage=19 2005 conf/ctrsa/2005 CT-RSA db/conf/ctrsa/ctrsa2005.html#BilletG05