Matthias Jacob Dan Boneh Edward W. Felten Attacking an Obfuscated Cipher by Injecting Faults. 16-31 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2696&spage=16 2002 conf/ccs/2002drm Digital Rights Management Workshop db/conf/ccs/ccsdrm2002.html#JacobBF02