Below the Operating System: The Security Risk of CPU Backdoors
Download Description:
Modern security architecture begins with an assumption that is rarely stated explicitly: the processor executes instructions according to its documented architecture. Operating systems depend on the CPU to enforce privilege levels. Hypervisors depend on it to isolate virtual machines. Authentication systems depend on comparison operations returning correct results. Cryptographic software depends on arithmetic instructions producing mathematically correct outputs. Secure boot depends on the processor faithfully verifying signatures and maintaining the state that follows from that verification. A CPU backdoor attacks this assumption at its lowest practical level.
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