Advanced cyberwar is different: a country’s assets lie as much in the weaknesses of enemy computer defenses as in the power of the weapons it possesses. So in order to assess one’s own capability, there is a strong temptation to penetrate the enemy’s systems before a conflict erupts. It is no good trying to hit them once hostilities have broken out; they will be prepared and there’s a risk that they already will have infected your systems. Once the logic of cyberwarfare takes hold, it is worryingly pre-emptive and can lead to the uncontrolled spread of malware.
-- Misha Glenny, visiting professor at the Columbia University School of International and Public Affairs
Src: Stuxnet Will Come Back to Haunt Us - NYTimes.com