In an excellent editorial, Bruce Schneier explains how the NSA weakens American security (because the NSA relies upon weaknesses in American technology to permit it to spy) without stopping terrorism (by General Keith Alexander's own admission, the only plot foiled by bulk NSA spying was a plan by a guy in San Diego to send $8500 to some Somali militants).
It's not just domestic abuse we have to worry about; it's the rest of the world, too. The more we choose to eavesdrop on the Internet and other communications technologies, the less we are secure from eavesdropping by others. Our choice isn't between a digital world where the NSA can eavesdrop and one where the NSA is prevented from eavesdropping; it's between a digital world that is vulnerable to all attackers, and one that is secure for all users.
Fixing this problem is going to be hard. We are long past the point where simple legal interventions can help. The bill in Congress to limit NSA surveillance won't actually do much to limit NSA surveillance. Maybe the NSA will figure out an interpretation of the law that will allow it to do what it wants anyway. Maybe it'll do it another way, using another justification. Maybe the FBI will do it and give it a copy. And when asked, it'll lie about it.
NSA-level surveillance is like the Maginot Line was in the years before World War II: ineffective and wasteful. We need to openly disclose what surveillance we have been doing, and the known insecurities that make it possible. We need to work toward security, even if other countries like China continue to use the Internet as a giant surveillance platform. We need to build a coalition of free-world nations dedicated to a secure global Internet, and we need to continually push back against bad actors—both state and non-state—that work against that goal.
How the NSA Threatens National Security [Bruce Schneier/The Atlantic]