- In 2000, a team of computer scientists created CAPTCHA (Completely Automated Public Turning testing to tell Computers and Humans Apart) to fight spambots congesting internet traffic and harvesting data.
- CAPTCHA initially required users to re-type letters or digits from distorted images, requiring constant updates to keep bots from hacking.
- By 2009, CAPTCHA was re-purposed (reCAPTCHA) as a digital crowdsourcing effort whereby millions unknowingly confirmed the text from scanned digital books.
- By 2014, CAPTCHA advanced to implicit human detection based on subtle mouse movements.
CAPTCHA for Crowdsourcing— Prove You’re Human
(11/04/2019)
