Today, I would like to kickoff the knowledge sharing initiative which we took earlier.
Following are the some quick points on CAPTCHA:
Full form of Captcha: Completely Automated Public Turing-test to tell Computers and Humans Apart.
How it works: The CAPTCHA security image works by asking the website visitor to type in a code they see correctly.
A human can do this, but an automated computer program cannot.
Why we use it: To stop automated computer spam robots from filling out forms, harvesting email addresses, and then sending out countless spam emails.
The term CAPTCHA (for Completely Automated Turing Test To Tell Computers and Humans Apart) was coined in 2000 by Luis von Ahn, Manuel Blum, Nicholas Hopper and John Langford of Carnegie Mellon University. At the time, they developed the first CAPTCHA to be used by Yahoo.
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