Hello! As I understood:
- initramfs presents the locked LUKS key to Zymkey
- Zymkey validates the signature and decrypts the key
- The decrypted key is presented to LUKS and the root file system is then decrypted
Isn’t it possible to read the decrypted key by using a logic analyzer on the I2C lines between the Zymkey and Raspberry Pi? Is there any protection implemented against this type of attack?