XOR is also great for storing copyrighted works without liability.
a = the bits of some song or movie
b = pure noise
Store c = a^b.
Give b to a friend. Throw away a.
Now both you and your friend have a bit vector of pure noise. Together you can produce the copyrighted work. But nobody is liable.
Whether people are liable is a question for the courts, and I suspect they simply look through the tech and ask "do you end up with a copy of the work?"
(unless you're an AI company, in which case you can copy the whole internet just fine)
Pretty sure the law doesn't care about this XOR trick.
This is the "What Colour are your bits?" argument:
> https://ansuz.sooke.bc.ca/entry/23
> https://ansuz.sooke.bc.ca/entry/24
As these article outline, the legal situation is much more complicated (and unintuitive to people who are used to "computer science thinking").