A power-residue calculating unit includes a K register connected to a first internal bus for once storing an intermediate calculation result to be discarded when a power-residue calculation is executed in accordance with a binary method. Therefore even when data to be discarded appears during the calculation,...http://www.google.de/patents/US20040064274?utm_source=gb-gplus-sharePatent US20040064274 - Residue calculating unit immune to power analysis
