The Little Brag Book Carnegie Mellon University:
"Preventing computer crime— one word at a time
Computer Science alumnus and professor Luis von Ahn and his colleagues are responsible for developing
CAPTCHAs, those wavy, distorted words online shoppers often need to decipher before completing a transaction.
CAPTCHA stands for 'completely automated public Turing tests to tell computers and humans apart.'
About 200 million CAPTCHAs are used each day, and they prevent many forms of computer crime.
Von Ahn's latest version, reCAPTCHAs, goes a step further, harnessing this puzzle-solving human effort to digitize smudged words from old books and newspapers."
Saturday, September 5, 2009
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