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A large amount of on-chip infrastructure, such as design-for-test, debug, monitoring, or calibration, is required for the efficient manufacturing, debug, and operation of complex hardware systems. The access to such infrastructure poses severe system safety and security threats since it may constitute a side-channel exposing internal state, sensitive data, or IP to attackers.
Reconfigurable scan networks (RSN) as standardized by IEEE Std 1687 allow flexible and efficient access to on-chip infrastructure for test and diagnosis, post-silicon validation, debug, bring-up, or maintenance in the field. However, unauthorized access or manipulation of the attached instruments, monitors, or controllers pose security and safety risks. Different RSN architectures have recently been...
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