Evaluating the Usability and Security of a Video CAPTCHA.

Evaluating the Usability and Security of a Video CAPTCHA.

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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
ISBN-13:

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