Updated: Inaccessibility of CAPTCHA, alternatives to Visual Turing Tests on the Web

The Accessible Platform Architectures (APA) Working Group, with support from the Research Questions Task Force, has published an updated Working Draft of Inaccessibility of CAPTCHA, alternatives to Visual Turing Tests on the Web. This update includes changes that address the substantial comments received since the May 2019 version, which have helped us improve our analysis of the state of the art in telling human users apart from their robotic impersonators. Comments are requested by 26 July 2019. Please, read more in a dedicated blog post by Janina Sajka, Chair Accessible Platform Architectures (APA) Working Group, and learn more about the Web Accessibility Initiative (WAI).