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You may never know or heard what does Captcha mean. Captcha stands for Completely Automated Turing Test To Tell Computers and Human A parts, which means the test used to distinguish whether computers users are a machine or a human.

Captcha examinations made in such a way that only people who can do, while the machines cannot do it accurately. Currently computer ability to think is beyond of human left brain, especially in terms of counting. While the human right brain ability is still far to beat the computer capabilities. Human advantages and computer disadvantages are exploited in the Captcha techniques to distinguish between them.

The latest method implementation Captcha is often called reCAPTCHA. In implementing this Captcha method, reCAPTCHA analyze words that cannot read well by the OCR (Optical Computer Recognition) even human. Recaptcha is made for improving Captcha quality in case of bots in the system and assist in the process of making digital books to recognize words that cannot be read by OCR.

Applications from reCAPTCHA which is often found by the internet users when they are doing for sign-ups or giving comment on a forum when you are posting then you have to write a particular words on the text box given.

When you create a website, you must think about the security of the website itself because many transactions are done through websites such as online transactions, internet banking or pay pal. For cases like this, it is really needed Captcha Security that will prevent incoming spam. To ensure that spam cannot enter, need to create a qualified Captcha.