Re: Remember your audience
"They can not grasp either you have secure, encrypted communication for everyone or no one has it. The math is rather binary on that point."
Way back in the late 80s I worked in banks. Back then DES was export restricted and PGP didn't exist.
We wanted encrypted comms, for obvious reasons. So I applied for a DES export licence. It was a long and complicated process but in the end I got one.
So you *can* have legal secure and encrypted communication for *some* people and not everyone. The maths says nothing about legality.
Nowadays things are different, source code to many algorithms is widely published, but that wouldn't stop a government introducing a licencing system for encryption if it wanted to. Licences issued to Google, Snapchat et al. on the condition that they open comms on production of a warrant. You can't uninvent the white van either, but you can regulate courier services (as Uber are discovering). Before you all start ranting, I don't think they should, but they could.
All this talk about "you can't change the maths" could equally be applied to firearms - you can't change the basic physics either but that doesn't stop governments restricting their availability. Any idiot with a lathe can make a bad gun, just as any programmer with a compiler can make a bad encryption app.