CAPTCHA is a way how to verify that web application user is human. Using of CAPTCHA is a need in many web applications. Today it is commonly used by types based on the recognition of alphanumeric characters. The problem is that these tests are becoming more and more complicated for people, but, on the other hand, they are becoming even easier for bots. Therefore, I decided to create a concept to be based on a completely different principle. The result of my endeavour was the 3D captcha technology.