What is captcha for?
Captcha system is used on the online sphere as a method of verifying a user as a human being. Since some websites (such as forums & blogs for example) might be attacked by bot spammers sending endless garbage data, links or ads, they use captcha service as a mean of spam prevention.
Defeating Captcha?
Most Captchas contain distorted letters or alphanumeric characters. Some Captchas display a mathematic problem, logical questions, audio letters or words for blind people, all are easy to be deciphered by human beings but not by robots. Yet currently scientists are working hard on developing robot computers which are capable to pass the captcha test, meaning they manage to crack it. Currently the statistics stands on the fact that 1 out of 5 Captchas is being cracked.
3D Image Recognition captcha
What can be done to stop this captcha bot cracking? Websites can use a different kind of captcha based on a 3 dimensions images. 3D Image Recognition Captcha is unbreakable by robots so far, since it requires a function of a human brain.
How does the 3D Image Recognition Captcha work? One or three 3D images are displayed. Than the user is required to click on another box which opens and shows another 9 3D images. Among those 9 images, 3 are identical to the formers but rotated. The user has to match them consequently with 3 empty boxes. A human brain can discern the images easily but no robot has a perception of discerning rotated images… not yet! Therefore, 3D Captcha image is a marvelous spam blocker..
