reCAPTCHA

Updated: 09/12/2023 by Computer Hope
ReCAPTCHA example

A CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) that not only helps protect a site from bots or other scripts, but also helps read books. With a reCAPTCHA, one word is generated by the script and the other is a scanned word that an OCR (optical character reader) program didn't understand. The idea is that if a user successfully understands one of the words the other word is also correct.

The picture shows a reCAPTCHA showing "were" and "tattoos" as words that need to be entered. reCAPTCHA has no real way of knowing what word is generated and what word is the scanned word.

Note

On September 16, 2009, Google announced it was acquiring reCAPTCHA.

Internet terms, lowerCamelCase, Scan, Script