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Submission + - CAPTCHA Using Ad-Based Verification (

mk1004 writes: Yahoo news has an article explaining how the text-based CAPTCHA is giving way to ad-based challenge/response. It's claimed that users are faster at responding to familiar logos, shortening the amount of time they spend proving that they are human.
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CAPTCHA Using Ad-Based Verification

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The solution of this problem is trivial and is left as an exercise for the reader.