With hackers deploying sophisticated attacks against operating systems, processors, and even firmware, manufacturers have increasingly turned to a tamper resistant processor—or part of one—often called a secure enclave to stymie all sorts of attacks. They place in that immutable chip the root of trust on a device, relying on it to run cryptographic checks every time the system starts to make sure nothing has been subtly, maliciously altered. If something is wrong, the secure enclave stops the...

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