Understanding NSA Two-Man Controls for Sysadmin Security

In an effort to lock the barn door after the horse has escaped, the NSA is implementing two-man control for sysadmins: NSA chief Keith Alexander said his agency had implemented a "two-man rule," under which any system administrator like Snowden could only access or move key information with another administrator present. With some 15,000 sites to fix, Alexander said, it would take time to spread across the whole agency.

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