OCR Captcha Alternative for Visually Impaired Users
Shivam Sehgal and Vandana Choudhary · International Journal for Modern Trends in Science and Technology · 2020
The internet has been playing an increasingly important role in our daily life, with the availability of many web services such as email and search engines. However, these are often threatened by attacks from computer programs such as bots. To address this problem, CAPTCHA (Completely Automated Public Turing Test to Tell Computers and Humans Apart) was developed to distinguish between computer programs and human users. Although this mechanism offers good security and limits automatic registration to web services, but many CAPTCHAs are not user friendly and sometimes can pose some challenge to the users, especially visually impaired users. This paper provides an alternative OCR based captcha that can be used by all the users (including visually impaired users). It would provide better user experience, easy to solve and hard for a bot to crack.