Countermeasures against repetitive side channel attacks

摘要

Computing devices that include repetitive side channel attack (SCA) countermeasures may include capacitive delay circuitry and timer circuitry to notify potential repetition-based attacks by sending activity detection signals that can be used to initiate appropriate countermeasures. I can. Additionally or independently, a computing device comprising an iterative SCA countermeasure includes at least one storage unit capable of storing an incoming input signal, at least one comparator that compares the incoming input signal with another signal and indicates a match, and is incremented if there is a match. It may include a counter. When the counter reaches a specified limit, an exceeded limit signal may be sent to notify of a potential repetition-based attack and initiate appropriate countermeasures.