If the adversary has physical access you are generally pwned either way
FiskFisk33
Spotify seem to confuse breaking the TOS with breaking the law.
It's actually mine but I don't like to say the quiet part out loud.
hahah, the geocentric model confirmed!
I mean, it's arguably in the center of OUR universe :D
Tiny black holes are the kind of thing that physically cant exist for more than a few like picosecods or something ridiculous like that before evaporating into radio waves.
A guess/suggestion:
You have an app with a private key. The qr code contains data encrypted with the corresponding public key. Your app decrypts the data and transmits it to googles servers, proving you are in possession of the secret key.
I agree with avoiding usage of the word retarded but, come on, you can still spell it out.
"like" is doing a lot of heavy lifting there
Well, those ones does it at the cost of size. In order to ensure separation they are comparatively huge.