Even IF the government had a way of breaking it, they would never reveal it, not ever. Not even to get at serial killers or worse.The reason is that it would immediately become the highest grade of military secret, only usable in a world war or similar.You know how they say war increases technological advancement? Well, that's not quite true. There's some truth in it, but not much. What really is happening is that the governments of the world deliberately hides certain technologies e.g. there are computer viruses in research labs that make STUXNET look like a toy. Often when you hear about some innovation in the private sector, it actually turns out some government scientist discovered it decades ago, but wasn't able to talk about it. Then they suddenly bring this box of toys out in wartime to gain the upper hand. Technology hording makes perfect strategic sense. There's a limit to this logic of course, if you applied it to every possibility you'd throttle the economy. I'm sure the RAND corporation would have something to say about all this.