Are you using Google’s reCAPTCHA? Then you might unknowingly be training Pentagon’s killer drones.
With the rise of blogs, web 2.0, and user-generated content, came a torrent of SPAM. Automated computer programs, or bots, were flooding the internet with comment SPAM, more often than not drowning out actual discussion. In an effort to deal with the problem, the good guys on the internet took advantage of the fact that computers used to be quite bad at recognizing objects in an image. And thus the “Completely Automated Public Turing test to tell Computers and Humans Apart”, or CAPTCHA was born.The first CAPTCHA implementations were dead simple. To be allowed to write a comment on a web site, the user had to recognize the letters in an image, and then write those exact letters in a text box. If the letters in the image matched the ones provided by the user, the site knew user was human, and was thus allowed to comment. Recognizing the letters in the image was an easy task for most people, but the bots didn’t stand a chance. But as image recognition software became more advanced, the bots started to solve the first CAPTCHA implementations. The dam was about to break, and to prevent this, the internet created more advanced CAPTCHAs. Some of these second generation CAPTCHA implementations were terrible, like the one in the image to the left. Sure, they were impossible for bots to solve, but they were also very hard for a human being to figure out. It happened more than once that I simply gave up filling out an online form because of an unsolvable CAPTCHA.
Then Google came along with their silver bullet: reCAPTCHA.