allows one to simply sniff the traffic between the discrete TPM chip and CPU via an SPI bus. The way Bitlocker works is to use a private key stored in the TPM chip to encrypt the full volume key ...
In this configuration, the TPM automatically sends the encryption key to the boot loader during boot. This key is sent over an SPI interface in plaintext. All that is needed is to probe the SPI ...
AMD has determined that select AMD Ryzen™ system configurations may intermittently perform extended fTPM-related memory transactions in SPI flash memory (“SPIROM”) located on the motherboard ...