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Generate Animated CAPTCHA Based on Visual Cryptography Concept

Authors: Akbas E. Ali --- Nidaa F. Hassan --- Matheel Emad EL-Deen Abdulmunim
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2011 Volume: 29 Issue: 16 Pages: 3405-3416
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

CAPTCHA is a standard security technology. To date, the most commonly used are various types of visual CAPTCHAs, in which a challenge often appears as an image of distorted text that the user must decipher. The proposed scheme is used visual cryptography encryption protocol to encrypt CAPTCHA image in perfectly secure way, such that only the human visual system can easily decrypt the CAPTCHA image with animated arrangement. Numbers of blurring image process are implemented on the CAPTCHA images, to make this test difficult for current computer systems. The new animated CAPTCHA is more secure than the currentversions and easier for humans to pass.

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