Surely some three letters organization probably could pull that off, but it add risk to their operation that the operation could be leaked. This is basically a

Surely some three letters organization probably could pull that off, but it add risk to their operation that the operation could be leaked. This is basically a point I've made in a few of my talks about security and cryptography: The point of cryptography isn't to guarantee that your data is safe; it's to raise the cost of an attack to the point where a potential attacker decides not to attack. In particular, there's usually a human involved somewhere (sending or receiving information, or both) and humans are squishy and fragile; but torturing people attracts far more adverse attention than torturing data.