Don't call encryption illegal. That's letting them shape the narrative.
To those who say "it's impossible to make encryption illegal": there have been sillier laws. George Orwell once imagined a society where 2+2=5 was a law. While they usually do, laws don't have to make sense.
> https://en.wikipedia.org/wiki/Crypto_Wars
> https://en.wikipedia.org/wiki/Export_of_cryptography_from_th...