The web access initiative arm of w3c leans towards things like math problems because the other types tend to create barriers of some kind.
From  cognitive to cultural to language  etc.
Honnypots as well, those with fields saying this field intentionally left blank, or please leave this field blank etc. Speaking only for myself the ones that involve text messages can present access barriers as well.
Kare



On Fri, 11 May 2018, E.T. wrote:

I've been playing email tag with someone who operates a web site that uses the picture captcha for people who sign up.

We talked about the 2-step verification method where one gets a code via text message. He is of the opinion that this isn prone to hacks. He chose to use the picture captcha after his site was overwhelmed with bots that created thousands of fake accounts. He also mentioned Google Authenticator and Authy. Anyone have experience with those?

Of late I have seen less of the captchas that uses letters and numbers and more of the picture captchas. I see the 2-step verification still but not as often. Due ti hearing, I've never tried the audio challenges but understand they are no better.

I don't know where this trend will take us but no doubt it will go away. What do you all see coming in the future? I am most interested in the accessibility angle.

From E.T.'s Keyboard...
  ancient.ali...@icloud.com
Many believe that we have been visited
in the past. What if it were true?

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