Telling humans and computers apart automatically
Communications of the ACM - Information cities
WIAMIS '07 Proceedings of the Eight International Workshop on Image Analysis for Multimedia Interactive Services
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In some websites, it is necessary to distinguish between human users and computer programs which is known as CAPTCHA (Completely Automated Public Turing test to tell Computers and Human Apart). CAPTCHA methods are mainly based on the weaknesses of OCR systems while using them are undesirable to human users and cannot be used in some devices such as devices without keyboard. Nintendo DS is a popular handheld game console which was released in 2004. Nowadays, facilities such as the Internet connection are added in new game consoles and they are not merely used for playing games. Nintendo DS is also capable of connecting to the Internet by using the Nintendo DS Browser. But Nintendo DS Browser has some limitations such as no support for Adobe Flash. Therefore we cannot use the available CAPTCHA methods on the Nintendo DS. In this paper a new CAPTCHA system based on Online Collage CAPTCHA is designed for Nintendo DS Game console. This project has been implemented by PHP scripting language.