this post was submitted on 11 Apr 2024
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I thought this at first as well, but they have an interesting property.
They have a manufacturer signed private key. If you get the public key from the manufacturer of the TPM, you can actually verify that the TPM as it was designed by the manufacturer performed the work.
That's a really interesting property because for the first time there's a way to verify what hardware is doing over the network via cryptography.
Or, if I can extract that key from the hardware, I can pretend to be that hardware whenever I want, right?
Hmmm... I was going to say no because it's asymmetric crypto, but you're right if you are somehow able to extract the signed private key, you can still lie... Good point
Got some bad news. They already can do that. It's a very low effort attack too. Current TPM spits its key out in clear text. Funny right?