The solution to privacy in the face of foreign dragnet surveillance is cryptography.

I agree with you on that.. of course defensive matters must come to aid this dragnet environment..

We cannot put the genie back in the bottle anymore,once he came out..

But,together with preventive and defensive measures, politically we must make our governments and rule makers to stand in favor of privacy, writing more severe laws against mass surveilance, that do not obey any court order for particular citizens....

Even if they lie, and they tell us they do so.. once we catch them lying, like right now, we can do something about it, in the political sphere.. their political position are defenseless

For instance, Companies in US right now need to fight politically over this, because even the economy is in danger..

So i think this is a battle that should be fight in two fronts.. If we pick just one of them, we will lost in the long term