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30th
Chaining CAPTCHAs for fun and profit?
A CAPTCHA is a type of challenge-response test used in computing to determine whether a user is human. Yahoo! is having major difficulties with its CAPTCHAs. Russian hackers are able to pass their Turing tests with 35% accuracy. Some human beings say that their accuracy is 80% on these same tests.
This accuracy is not an historical breakthrough since academics got almost perfect scores on earlier Yahoo! CAPTCHAs. Nevertheless, 35% appears to be good enough to make the CAPTCHA nearly…
