““But U.S. computer systems have back doors, too: just ask Edward Snowden, the former NSA contractor who leaked classified information about such vulnerabilities. In cybersecurity, a good offense is the worst defense. U.S. officials should work to prevent a “cyber–Pearl Harbor” through better defenses. But waiting for cyberwar, as Limnéll suggests, is a failure of imagination. “This is our cyber-9/11,” a British intelligence official told me, referring to the Snowden leaks. “We just imagined it differently.””
