Sandeep Kumar Christof Paar Jan Pelzl Gerd Pfeiffer Manfred Schimmler Breaking Ciphers with COPACOBANA - A Cost-Optimized Parallel Code Breaker. 101-118 2006 conf/ches/2006 CHES http://dx.doi.org/10.1007/11894063_9 db/conf/ches/ches2006.html#KumarPPPS06