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IMAGINATION: a robust image-based CAPTCHA generation system

9 years 1 days ago
IMAGINATION: a robust image-based CAPTCHA generation system
We propose IMAGINATION (IMAge Generation for INternet AuthenticaTION), a system for the generation of attack-resistant, user-friendly, image-based CAPTCHAs. In our system, we produce controlled distortions on randomly chosen images and present them to the user for annotation from a given list of words. The distortions are performed in a way that satisfies the incongruous requirements of low perceptual degradation and high resistance to attack by content-based image retrieval systems. Word choices are carefully generated to avoid ambiguity as well as to avoid attacks based on the choices themselves. Preliminary results demonstrate the attack-resistance and user-friendliness of our system compared to text-based CAPTCHAs. Categories and Subject Descriptors K.6.5 [Management of Computing and Information Systems]: Security and Protection. General Terms Verification, Security. Keywords Automated Turing test, CAPTCHA, image retrieval.
Ritendra Datta, Jia Li, James Ze Wang
Added 26 Jun 2010
Updated 26 Jun 2010
Type Conference
Year 2005
Where MM
Authors Ritendra Datta, Jia Li, James Ze Wang
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