The issues with CAPTCHA

Last updated: May 28, 2016

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Back in 2009, we published a post called "New Logical Captcha Plugins for WordPress". One of those plugins is no longer available. Since 2009 there have been many articles and discussions about using CAPTCHA and new plugins developed for preventing spam. Those maintaining websites need to prevent damage to their sites due to unwanted spam, yet these prevention methods often keep out legitimate site visitors, too.

We collected a list of a few articles and discussions about the issues with CAPTCHA. If you have slapped a CAPTCHA solution onto your site without considering what problems you might be causing legitimate visitors, you really need to take some time to read and learn from these articles. Note that many of them include even more links about the challenges. Kudos to the people working to resolve this long-standing problem with security solutions blocking legitimate visitors. There is still lots of work to do, so please consider sharing your knowledge or experience in the comments.

Articles and Discussions

Plugins

Here is a list of some plugins that claim to be accessible or user-friendly. Based on some of the discussions in the previous list, none of them are perfect solutions. Some claim to avoid issues for one disability, yet they still have issues for other disabilities. For example, do the logic-based tests consider issues with cognitive or learning disabilities? Let us know what you are using these days and why. [Someone once suggested an accessible slider as part of a CAPTCHA solution, but we couldn’t find that link. Please share it in the comments if you know what happened to that project.]

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