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Signed how, though? A crypto scheme that Intel came up with 20 years ago is probably not secure, and if they haven't updated it since then, well...
by dlitz 11y ago
Signed how, though? A crypto scheme that Intel came up with 20 years ago is probably not secure, and if they haven't updated it since then, well...
- userbinator 11y agohttp://inertiawar.com/microcode/ http://inertiawar.com/microcode/ suggests a variant of SHA1 or SHA2 with 2048-bit RSA. No doubt it's changed since the P6, probably with different private keys for each CPU model/family, but the public key must be present in the hardware in order to verify, so theoretically it could be extracted... Edit: public key. There might be a test mode which bypasses this or something.
- kryptiskt 11y agoNo, the private key doesn't have to be present. They sign with the private key, the CPU verifies with the public key.