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Microcode updates are signed with an asymmetric key ever since the Core line, so no, you can't "extract" the key because the only key the computers have is the
by marcan_42 5y ago
Microcode updates are signed with an asymmetric key ever since the Core line, so no, you can't "extract" the key because the only key the computers have is the public key, not the private key.
- ChuckMcM 5y agoI misread this paragraph: As a matter of fact, several vulnerabilities in Intel ME have been discovered in the past. Among others, Ermolov, Sklyarov, and Goryachy described a method to extract the secret key that is used inside the CPU to decrypt microcode updates, which also led to the possibility of executing your own microcode on the CPU or reading Intel's microcode. Where it talked about extracting the secret key.