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CAPTCHA is a test that can tell humans and computer programs apart automatically. The aim is to allow the server to identify the visitor is a human or a computer, and only provide services to human. It can improve the current server system and user information security. The static plane visual CAPTCHA based on OCR problems with the advantages of implementation and operation[1] become the mainstream...
Nowadays, malicious computer programs have attempted to attack websites, greatly affecting their availability and security. CAPTCHA (Completely Automated Public Turing test to tell Computers and Human Apart) mechanism is an effectual method in solving this problem. The prevailing implementation of CAPTCHA is 2D still image verification code, however, the developing artificial intelligence and image...
In order to avoid tremendous attack from malicious computer programs, CAPTCHA (Completely Automated Public Turing test to tell Computers and Human Apart) mechanism has been introduced to distinguish humans and computers. Due to the fast development of pattern recognition and artificial intelligence technology, there are increasing safety loopholes concerning traditional 2D static CAPTCHAs, resulting...
In order to distinguish between human users and computer programs, CAPTCHA (completely automated public turing test to tell computers and human apart) mechanism is widely applied in Web sites such as accounts application Web site. While the major implementation of CAPTCHA method-2D still image verification code based on OCR technology is threatened by developing artificial intelligence and image recognition...
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