A Novel Animated CAPTCHA Technique based on Persistence of Vision

Image-based CAPTCHA challenges have been successfully used to distinguish between humans and bots for a long time. However, image-based techniques are constantly broken by hackers, forcing web developers implement more robust security features new approaches in images. Modern-day can use many technologies break images automatically. These include OCR, Segmentation, erosion, threshold, flood fill, etc. This led innovative systems, including those based on drag drop, image recognition, fingerprint, mathematical problems, Animated CAPTCHAs also designed show moving characters objects require users recognize the or animation. Unfortunately, these systems successfully. research proposes novel animated technique persistence of vision, which shows text multiple layers an image. The proposed has implemented PHP using GD library functions tested various popular breaking tools. Further, challenge against frame separation technique. analysis usability study demonstrated user-friendliness, vast accessibility, robustness.