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Websites need to verify that a visitor is a real person and not an automated bot. But the CAPTCHA test that they came up with — where you have to type in the word that you see in a blurry distorted font image — is extremely annoying and often leads to multiple failures.
So a Detroit-based startup, Are You a Human, is replacing the CAPTCHA with simple minigames instead. It is releasing its human authentication tool, PlayThru, to help companies fight spammers and bots that have begun to circumvent CAPTCHAs. Companies using it include Quicken Loans and Fat Head, and users have played nearly 2 million games to date.
The problem is that these questions, and particularly the obvious generic "color of coal" variants, will become machine-solvable in time. In much the same way that OCR has progressed in effectiveness. Unfortunately, anything your web visitor can do, a machine can do... it's just an arms race.
especially as so many CAPTCHAs are becoming unreadable