I was thinking recently, if I lost my watch (or more specifically, it was stolen) while I had GPS data on it, then my home address, work etc is all present there.
I'm interested in peoples' opinions on this - would a patch to runplus and/or a module for apps to encrypt and decrypt GPS data be useful?
Tech / CPU use
I feel like AES might be overkill, and we could instead perform some simple scrambling of the coordinates based on a code the user enters, perhaps offset them from the middle of the Pacific using the user's code as a seed for a PRNG.
Unless we saved the key on the watch (which defeats the point), the user would have to enter a code each time they wanted to read/write GPS - this wouldn't be great for usability, but I'm a little out of ideas.