08-01-2014, 03:15 PM
CAPTCHA – A TYPE OF SECURITY TEST
Abstract
Whenever you register or login into a website, a rectangle distorted image is shown that displays some quite unreadable text on it. The computer asks to enter the displayed text in a text input that is called CAPTCHA. CAPTCHA stands for “Computer Automated Turning Test to TellCAPTCHA is a type of security test that is taken by the computer system before registering the user to get the proof of human that means the registrant is an alive human not a programmed bot or spam. Because the internet spammers develop some programmer bots or spam that read the structure of all kind or forms (Common Forms) on the internet such as forum registration page, wordpress comment forum etc and then register on them by bypassing all the validations using fake data. This is done by spammers for advertising their products or some other illegal activities. CAPTCHA prevents this kind of automatic registration or login process because by using CAPTCHA the user must enter the CAPTCHA code produced on distorted image in the input box, otherwise the registration will not succeed. Alive human can see the code and enters easily but the programmed bots have neither eyes nor ears and so they can’t bypass this CAPTCHA field.
Abstract
Whenever you register or login into a website, a rectangle distorted image is shown that displays some quite unreadable text on it. The computer asks to enter the displayed text in a text input that is called CAPTCHA. CAPTCHA stands for “Computer Automated Turning Test to TellCAPTCHA is a type of security test that is taken by the computer system before registering the user to get the proof of human that means the registrant is an alive human not a programmed bot or spam. Because the internet spammers develop some programmer bots or spam that read the structure of all kind or forms (Common Forms) on the internet such as forum registration page, wordpress comment forum etc and then register on them by bypassing all the validations using fake data. This is done by spammers for advertising their products or some other illegal activities. CAPTCHA prevents this kind of automatic registration or login process because by using CAPTCHA the user must enter the CAPTCHA code produced on distorted image in the input box, otherwise the registration will not succeed. Alive human can see the code and enters easily but the programmed bots have neither eyes nor ears and so they can’t bypass this CAPTCHA field.