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Submission + - Researchers defeat CAPTCHA on popular websites (networkworld.com)

alphadogg writes: Researchers from Stanford University have developed an automated tool that is capable of deciphering text-based anti-spam tests used by many popular websites such as Visa and Blizzard's World of Warcraft with a significant degree of accuracy. The researchers, who presented results of their year-and-a-half long CAPTCHA study at the recent ACM Conference On Computer and Communication Security, devised various methods of cleaning up purposely introduced image background noise and breaking text strings into individual characters for easier recognition, a technique called segmentation.

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