“CAPTCHA: Impact of Users with Learning Disabilities, and Implementation of Dynamic Game based Captcha to Improve the Access for Users with Learning Disabilities.”

CAPTCHA, commonly known as Completely Automated Public Turing Test to tell Computers and Humans Apart, is a widely used solution to verify whether a user attempting to access a website is a human or an automated software. It serves as a form of the Turing test, aimed at detecting robotic involvement in web security breaches and distinguishing them from human users. This test is particularly valuable for web-based applications to prevent unauthorized activities, automated access, and potential harm caused by robots. CAPTCHA takes various forms, including deformed text, mathematical puzzles, OTP (One Time Password), audio challenges, 3D visualizations, graphical puzzles, and gaming challenges. Gaming CAPTCHA, in particular, has gained popularity as a highly secure option. These CAPTCHAs often present users with simple logical tasks, such as dragging objects to designated positions, while some may pose significant challenges even for humans due to their complexity. The effectiveness of a CAPTCHA lies in its ability to be easily solvable by humans within a short timeframe, making it nearly impossible for robots to crack. However, there is a constant need for improved CAPTCHA systems that can offer higher accuracy and require intellectual efforts from users to solve queries. This paper aims to address these requirements by offering CAPTCHA challenges that demand logical thinking, making them easily solvable by humans but challenging for robots. The game-based interface of the proposed system is visually appealing and interactive, encouraging users to solve CAPTCHAs without frustration. The development of CAPTCHA and the enhancement of web accessibility are crucial for ensuring a positive user experience for all internet users, including those with learning disabilities.