We still can't even get our coders to stop using C for security-critical code, and you could effectively throw C++ in that complaint bin too. We can't get people to implement crypto appropriately. The list goes on and on. And with cybersecurity you only have to get one thing wrong, especially on an open Internet, while the attacker gets effectively unlimited time and numbers of attempts (although they don't even need that so far, as long as 0-days can be bought off the shelf).

And all the stuff we can't do in the civilian sector, it's even harder to do right in government and military (and apparently critical industry). There's a whole host of things we can do to be better, but half the reason walls will go up is because they are so much better at dealing with novel threats than the idea of "just design and implement everything perfectly, geez".

But either way, Germany's complaint wasn't just cyberattacks. There was also data privacy, and that complaint is centered entirely around the fact that they can't control whether a German's data gets routed to France, UK, etc. even in the course of entirely .de <-> .de Internet traffic.

But the roots are already here, it's not simply a prediction. After the 2007 Russian cyberattack on Estonia, Estonia was able to adapt and recover very effectively... but they still now have a national cyberborder in place, and are just waiting to hit the button (a useful button to have right now, given the crises in the Crimea).

Ironically things like open source will only make this trend easier I think. It's not hard to imagine governments setting up things like ownCloud with a federated model, with replication channels open to friendly nations' instances of ownCloud and closed otherwise.