Anti-Spam Turing Test Is Really Global Human-Powered OCR System

You know the test you have to take on Digg or Facebook, the one that proves you're a human? You see a hard-to-read word or string of gibberish, and you type in the correct characters. Carnegie Mellon researchers decided to replace randomly generated words with actual words from ancient manuscripts, words that machines… » 10/02/07 9:25am 10/02/07 9:25am