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A comment on Using WolframAlpha to Hack Text CAPTCHA. Parent comment

Re:Using WolframAlpha to Hack Text CAPTCHA by elliottcarlson on Wednesday November 10, 2010 @03:28PM (#1891688)
It's still a game of guesswork. Generally if you fail the CAPTCHA you will be offered a new one; and any good system should lock you out after a certain amount of failures.
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Re:Using WolframAlpha to Hack Text CAPTCHA by jerf on Wednesday November 10, 2010 @08:50PM (#1892541)
Assume spammers are using botnets. The problem of locking them out is as hard as detecting them in the first place.
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