It turned out that the hardware wallet does not sign the whole transaction data but only a hash of it. So it cannot change the nonce. But it is even worse: Th

It turned out that the hardware wallet does not sign the whole transaction data but only a hash of it. So it cannot change the nonce. But it is even worse: The act of signing the hash is not deterministic: https://medium.com/@simonwarta/signature-determinism-for-blockchain-developers-dbd84865a93e https://medium.com/@simonwarta/signature-determinism-for-blo... So it seems that: 1: Every hardware wallet can phone home 2: There is nothing that can be done about it