RE: CAPTCHA advice in WCAG

I would expect guidance on this topic to be more likely in Silver than in WCAG 2.2, but that's just a prediction derived from experience contributing to WCAG over the years. Sooner would of course be better.

It also seems to me that there's a general principle emerging from our draft Note: non-interactive security strategies are to be preferred to those requiring interaction from the user. In so far as interaction is required, it should demand as little as possible of the user's sensory, cognitive, and manipulative abilities, consistently with meeting the security objective. The challenge here is that it's a matter of balancing the demands imposed on the user with what is needed to achieve a security goal; and there isn't a single "right answer" to this problem, as we acknowledge.

This principle doesn't meet the demands for clarity, verifiability, and specificity that need to be met by WCAG success criteria; but it does at least offer a starting point for further development.

From: Scott Hollier <scott@hollier.info>
Sent: Friday, June 7, 2019 2:25 AM
To: public-rqtf@w3.org
Subject: CAPTCHA advice in WCAG

To the RQTF
My connection dropped out just before the end of our meeting on Wednesday, and it was just at the point where there was some discussion from Judy about looking at how CATPCHA guidance could be included in a future WCAG update. In the workshops I run I get asked about CAPTCHA a lot in terms of WCAG and if there is interest in supporting the workflows for a WCAG 2.2 or similar update I'd be happy to get involved if anyone could provide some guidance on how the workflows operate.

Scott.

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