For Review: Inaccessibility of CAPTCHA Working Draft

Inaccessibility of CAPTCHA is being revised and updated. A Working Draft is available for review. Since the last publication, the abilities of robots to defeat CAPTCHAs has increased, and new technologies to authenticate human users have come available. This update brings the document up to date with these new realities. For more information, see the blog post Updated and extensively revised “Inaccessibility of CAPTCHA” Published. Please submit any comments by 31 July 2018.