So there are two problems: A) There's reason to believe commonly used encryption is broken. The Snowden documents suggested VPNs in particular had been poorly

So there are two problems: A) There's reason to believe commonly used encryption is broken. The Snowden documents suggested VPNs in particular had been poorly set up, which allowed their encrypted traffic to be sniffed. There will be more things we currently believe to be encrypted and are not B) Session cookies and tracker cookies make it easy for your HTTP requests to be linked back to you