Pattern Recognition CAPTCHA

The idea of habrauser enikei realized on a commercial basis. The point is to make more resistant to automatic hacking captcha, based on pattern recognition. It is enough to show the user the subject and ask to indicate what is depicted on it (as suggested in Habré). Or show him nine pictures of animals and ask him to poke a mouse over an image, for example, dogs. This method is offered by the creators of the startup Captcha the Dog .



The technique assumes that the user is shown nine pictures, of which there is only one dog. And this test is banished four times to prevent multiple random guessing. Dogs and cats are different all the time (or the same from different angles), so automatic hacking with modern methods is impossible at all.
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The code to insert captcha to your site can be taken free of charge . The same, only on unique pictures, costs $ 25 per year.

via News.com