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Image-Based CAPTCHAs for Website Security

Screenshot of an image-based CAPTCHA.A two step verification process system for the generation of attack-resistant, user-friendly, image-based CAPTCHAs. Controlled distortions are produced on randomly chosen images and presented to the user in the form of a mosaic, then the images are distorted in a way that precludes the use of state-of-the-art computer image recognition technologies. James Wang & Jia Li

Image-Based CAPTCHAs

Image featuring two professionals shaking hands.

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