Captcha and Its Techniques: A Review
نویسندگان
چکیده
Captcha (Completely Automated public Turing test to tell Computers and Humans Apart) system is used to verify whether a user is human or computer program. It’s also known as human Interactive Proof (HIP) and based upon Artificial Intelligence. Captcha is a program that protects websites from web-bots by generating tests that computer cannot pass but human can pass .This paper comprise introduction of captcha, various techniques, application of captcha and drawbacks of captcha. Index Terms – Captcha, Application, Issues and Drawback of captcha.
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