Everything that is non-verifiable, requires trust. So, if you can verify that your hardware works correctly, you don't need to trust the manufacturer or supply

Everything that is non-verifiable, requires trust. So, if you can verify that your hardware works correctly, you don't need to trust the manufacturer or supply chains. There are ways to verify that hardware works correctly. 3: You measure RF signals to verify that there's no wireless connection of any kind. 6: You can verify the public key by using multiple devices from different vendors with the same seed. Practically speaking, you don't need to verify everything yourself. It's guaranteed that any information about attacks will be quickly available, if someone is able to verify everything.