![]() The table below summarizes the advantages and disadvantages for specific types of CAPTCHA. For example, an image-based CAPTCHA can be very difficult or impossible to complete for users who are blind or have low-vision. The problem with CAPTCHAs is that they are not accessible to all types of users, which mean that some users will not be able to complete the form on the website. ![]() ![]() More recent information is available in: Inaccessibility of CAPTCHA - Alternatives to Visual Turing Tests on the Web CAPTCHAĪ CAPTCHA (Completely Automated Public Turing Tests to Tell Computers and Humans Apart) is a feature/tool to ensure that user input has not been generated by a computer. Status: This is an old page that is not currently being updated.
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