CAPTCHAs May Do More Harm Than Good

If an annoyance contest were held between passwords and CAPTCHAs, passwords would probably win, but not by much. CAPTCHA -- Completely Automated Public Turing Test To Tell Computers and Humans Apart -- was created to foil bots attempting to mass-create accounts at websites. Once created, those accounts could be exploited by online lowlifes for malicious ends, such as spewing spam. However there are signs that the technology that uses distressed letters to weed out machines from humans may have outlived its usefulness.



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