Mathematically impossible means NO ONE can do it. It is mathematically impossible to build encryption that protects you but not terrorists.
You can either have e-commerce, e-government, and the Internet of Things, or you can have no encryption and NONE OF THEM.
"Bitcoin wastes power," they said. "Proof-of-work should do actual work," they said. Be careful what you wish for. usenix.org/conference/woo…
If you want to eliminate fake news, find business models that don't rely on whoring users' attention out to advertisers. (13/14)