Encrypt/mask GPS data stored on watch

I like the sound of asymmetric keys or using phone IDs/mac addresses to encrypt too. E.setPassword sounds very useful for dealing with more technical attacks - I suppose an existing bluetooth whitelist will cover anyone accessing the console unless an attacker guess the allowed mac addresses too.

I'm thinking the existing scramble GPS app works as a lightweight/ease-of-use "lock", and I have a few ideas for a more lockdown-mode which would incorporate these ideas along with encryption based on some key.

We could either encrypt just GPS and use recorder's existing async prompting to add a password-prompt afterwards, or go for more of a whole-device lock and request a password at either boot or unlock time.