Keybase seems to have a pretty good strategy for passing encryption keys between devices without Keybase itself having access to the keys. (I feel like this wou

Keybase seems to have a pretty good strategy for passing encryption keys between devices without Keybase itself having access to the keys. (I feel like this would be a great market for them to insert themselves into, possibly licensing their platform to IoT vendors.) But yeah, I imagine you'd have a passphrase/key that can be found on a new device, perhaps via a QR code, and then signing into a new client device would require you have access to the old device to approve it/allow the private keys to transfer between the two, etc.