Captcha refers to those distorted text tests that are used by websites to make sure that you are a human being & not a computer. Do you find them frustrating? So do a lot of people.
The search is in for something that's easier for human beings without making it easier for computers.
http://mashable.com/2012/12/17/minteye/
/ spam Minteye slider Carnegie Mellon University researchers website /
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