But other owners appear more ready to bring the latest tools to NFL. Jets owner Robert "Woody" Johnson, who occasionally rides a scooter around New York, sees no reason why tablets shouldn't replace the high-cost thermal photo printers that produce the photos that players currently study.

WSJ: Why Is the NFL Afraid of Technology?

It's too simple, writes hacker Robert Hansen, also known as rSnake, to find the source of the images, index them with the same tools the CAPTCHA-builders used and exploit that index to break the puzzle.

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