Eric Brier Helena Handschuh Christophe Tymen Fast Primitives for Internal Data Scrambling in Tamper Resistant Hardware. 16-27 2001 conf/ches/2001 CHES http://link.springer.de/link/service/series/0558/bibs/2162/21620016.htm db/conf/ches/ches2001.html#BrierHT01