One of the issues I've heard in regards to a counter cyber attack by the US is it will reveal our capabilities. The NORKs (or whoever) would do the same type of analysis that we do when someone hacks into one of our computer systems. You find where the vulnerabilities are and a way to stop the next attack.
Would we/should we use that option now or wait until a far more serious attack occurred?
Nothing we do will expose any serious capabilities we have. It's almost assured that North Korea internet infrastructure can be shut down or anyplace inside hacked with probably simpler attacks than was used against Sony.
The appropriate response would be to infiltrate their government computers with about a dozen different morphone rootkits, making them reinstall every single Windows95 computer from floppy.
