this post was submitted on 07 Feb 2024
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BitLocker encryption broken in less than 43 seconds with sub-$10 Raspberry Pi Pico — key can be sniffed when using an external TPM (www.tomshardware.com)
submitted 9 months ago by [email protected] to c/technology
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[–] [email protected] 15 points 9 months ago (2 children)

CPU communicates with TPM in plaintext

Because of course

[–] [email protected] 7 points 9 months ago (1 children)

CPU doesn't have any secure storage, so it can't encrypt or authenticate comms to the TPM. The on-CPU fTPMs are the solution, the CPU then has the secure storage.

[–] [email protected] 2 points 9 months ago

That make sense, CPU has no place to store private keys, since that is the functionality of TPM...

Unless there is a firmware solution, which defeats the purpose of a standalone tpm.