I thought they already had what they wanted
It is called AES. Easy to build giant government financed crackers with billions of nodes, hard for everyone else. Of course the local plods can't gain access (because the GC (giant cracker) is secret) but if the government specifies static keys and bans perfect forward secrecy at least they could chase the few terrorists who aren't the proverbial low hanging fruits.
Biting the hand that feeds IT
