Thread: Captcha, what is it and what is it good for

CAPTCHA is an automatic method to determine if the user software (Internet site, etc..) Is human or not. Method name is an acronym of English expression are "Completely Automated Public Turing test to tell Computers and Humans Apart" in English word CAPTCHA phonetically resembles the word capture (catch, the catch). The name was chosen in 2000 by a group of researchers at Carnegie Mellon University and at IBM. CAPTCHA is a special form of Turing test, which the ordinary is managed by a man.

The most common form of CAPTCHA is presented as an image containing distorted letters that the user must recognize them and to introduce the keyboard. Old versions of this test have already been defeated by advanced software optical character recognition. The party to which these programs still are obsolete man is garbled text segmentation in individual letters, the difficulty of programming this modern version is based CAPTCHA.

to check that are you human or not