Public and automated functional testing (captcha) with animations based on facial expressions

The growing need to avoid the generation of false information on the internet forces service providers to have options, the reverse test being completely automatic to distinguish computers from humans (CATPCHA Completely Automated Public Turing test to tell Computers and Humans Apart), one of the most varied and preferred methods to achieve this goal. In this research, a version of CAPTCHA is implemented that meets all design requirements, such as the simplicity in solving the challenge and the complexity necessary to avoid being solved by an automatic program. This article contributes by adding a procedure with which the CATPCHA is regenerated every 2 minutes, changing the location of the images randomly, including the keyboard where the answer is entered. Another contribution is the use of icons with facial expressions using animated gifs that have the cognitive advantage of identifying human beings concerning machines. In addition, the use of image segmentation techniques is avoided using techniques and distortions, which did not affect the use and identification of CATPCHA. To verify the effectiveness of the proposal, several tests were implemented that verified the effectiveness of the method.