Zymkey and LUKS sniff attack?

[Bob_of_Zymbit]

@cbriggs - See the answer here:

Is it possible to read decrypted key?

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?