helix2301 writes: "The U.S. government is expanding a cybersecurity program that scans Internet traffic headed into and out of defense contractors to include far more of the country's private, civilian-run infrastructure. As a result, more private sector employees than ever before, including those at big banks, utilities and key transportation companies, will have their emails and Web surfing scanned as a precaution against cyber attacks." Link to Original Source
Computers are unreliable, but humans are even more unreliable.
Any system which depends on human reliability is unreliable.