Not much of a story really. It is going to happen eventually. Point to point encryption for all types of communication is going to become normal.
I'm all for it. Sure, it gives some tools to the enemy who will probably be early adopters, but the very act of using such encryption should single them out from all the clear traffic. As for the information gathering tools we'd lose, new ones will arise. We can't freeze the enemy to using certain tools, and we can't limit ourselves eithers. With the breaking of the story of the wire tapping, the terrorists gained valuable intelligence on how we were disrupting their operations. They're already adapting, and now we have to find and adapt to them.
Information doesn't exist in a vacuum. If the terrorists are passing information through digital means, somewhere that information is unencrypted. Given that encrypted traffic can be sniffed for, tracked, rerouted - the terrorists may just discover that encrypted communications can reveal their agents, expose their agents, or may just be unreliable.
Oh, maybe not yet... But give our people time to work on the problem. I'm sure they'll figure out a way to accomplish the mission. It is a bastard of an inconvenience, but it was bound to happen.
It also gives tools to dissidents in Iran, N. Korea, China and Saudi Arabia.