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Rainer Bielefeld wrote on 2012-10-06 07:50:

not really. There are many alternative Captcha alternatives with the
advantage that it's not so difficult to read and input the shown code.
My wife is visually handicapped, her resume is that she can handle any
visual captcha except ReCaptcha, and until now she did not find any
"acoustic captcha" working for her.

But it seems that most admins do not accept alternatives as effective

my question was meant seriously, i.e. I really would like to have feedback what kind of mechanism people prefer. :-) It's clear that we have to do something, because we are a major target for spam.

Here is the list of available Captchas:

I've taken ReCaptcha, since that's quite common and provides audio support, so I thought it's the best alternative also for people with eye issues. Asirra had problems in the past, and is not suitable for people who cannot see properly, since there is no audio support.

FancyCaptcha has no audio support either, and MathCaptcha doesn't work currently, since the required extension only runs on older MediaWiki versions.

I've now switched to SimpleCaptcha, requiring to solve an easy math question, and hopefully screenreader supported. On the counterside, I expect that this does NOT help against wiki spam at all, since bots are that clever so they can answer trivial questions.

Another solution would be, given someone comes up with a list of nice questions.


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