Evaluating the Usability and Security of a Video CAPTCHA.
A CAPTCHA is a variation of the Turing test, in which a challenge is used to distinguish humans from computers (qbotsq) on the internet. They are commonly used to prevent the abuse of online services. CAPTCHAs discriminate using hard artificial intelligence problems: the most common type requires a user to transcribe distorted characters displayed within a noisy image. Unfortunately, many users find them frustrating and break rates as high as 60% have been reported (for Microsoft's Hotmail).A CAPTCHA is a variation of the Turing test, in which a challenge is used to distinguish humans from computers (aquot;botsaquot;) on the internet.
| Title | : | Evaluating the Usability and Security of a Video CAPTCHA. |
| Author | : | Kurt Alfred Kluever |
| Publisher | : | ProQuest - 2008 |
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