This article is meant to encourage readers to keep a high standard of what is acceptable for a CAPTCHA in second decade of the 21st century. It is neither meant to be a hacking tutorial nor is it meant to incite any type of malicious behavior. This article is for educational purposes only.

In a good-faith effort to protect the identity of the CAPTCHA provider being targeted throughout this article, some CSS class names and other code changes have been made.

Recently I came across a CAPTCHA on a WordPress site that utilized nothing but simple math (sometimes using the written out word for a number) to prevent automated submissions. I’m here to tell you this isn’t enough. Computers are inherently good at math and parsing written numbers into integers is no longer considered a difficult feat. …

About

Brice Hartmann

Software Engineer in Chicago, IL - bricehartmann.com

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