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New techniques have been discovered to find the secret keys stored in smart-cards. These techniques have caused concern for they can allow people to recharge their smartcards (in effect printing money), or illegally use phone or digital TV services. We propose a new processor design which will counteract these techniques. By randomising the instruction(More)
Techniques such as DPA and SPA can be used to find the secret keys stored in smart-cards. These techniques have caused concern for they can allow people to recharge their stored value smartcards (in effect printing money), or illegally use phone or digital TV services. We propose an addition to current processors which will counteract these techniques. By(More)
One of the challenges in designing systems is adopting a design method with compositional properties. Compositional functionality guarantees that two components that each perform a task can be integrated without a ecting the semantics of either task. Compositional performance means that two components can be integrated so that the timing of neither(More)