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Protecting Against Side Channels with Re-keying: Meet Isap

There have been many examples of systems being cracked through side-channel analysis. One of these methods is differential power analysis (DPA) and where an intruder can obverse the operation of the encryption key through electrical disturbances. One way to overcome these problems is to only use a key for a short time, and then to generate a new one. If an intruder finds one of the keys…