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schroeder ♦
schroeder ♦
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I've learned that a TPM can supposedly attest to the state of a computerscomputer's BIOS being good. It does this by asking the BIOS to send a hash of it'sits current state.

So what stops a compromised BIOS from sending a precalculated hash of a good state (that it is not in)?

Many thanks.

I've learned that a TPM can supposedly attest to the state of a computers BIOS being good. It does this by asking the BIOS to send a hash of it's current state.

So what stops a compromised BIOS sending a precalculated hash of a good state (that it is not in)?

Many thanks.

I've learned that a TPM can supposedly attest to the state of a computer's BIOS being good. It does this by asking the BIOS to send a hash of its current state.

So what stops a compromised BIOS from sending a precalculated hash of a good state (that it is not in)?

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Bob
Bob
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What stops a bad BIOS lying to the TPM?

I've learned that a TPM can supposedly attest to the state of a computers BIOS being good. It does this by asking the BIOS to send a hash of it's current state.

So what stops a compromised BIOS sending a precalculated hash of a good state (that it is not in)?

Many thanks.