CAPTCHAs are widely used by web applications for the purpose of security and privacy. However, traditional text-based not suitable sighted users much less with visual impairments. To address issue, this paper proposes a new mechanism CAPTCHA called HearAct, which is real-time audio-based that enables easy access The user listens to sound something (the “sound-maker”), he/she must identify what ...

problems, namely,a novel family of graphical password systems built on top of Captcha Zoo is a Captcha scheme which uses 3D models of horse and dog. mathematical concept related to 3D password, applications of scheme etc. Moreover, Pass. Point – is a recall-based graphical password schema, where a (2) Fawaz A. Alsulaiman and Abdulmotaleb El Saddik, “A Novel 3D. Graphical. also offers a novel ap...

Improvements in image understanding technologies are making it possible for computers to pass traditional CAPTCHA tests with high probability. This suggests the need for new kinds of tasks that are easy to accomplish for humans but remain difficult for computers. In this paper, we introduce Fluency CAPTCHA (FluTCHA), a novel method to distinguish humans from computers using the fact that humans...

Completely Automated Public Turing Tests to Tell Computers and Humans Apart (CAPTCHAs) are the automatic filters that are widely used these days to disallow any automated script that can perform the work of a human. CAPTCHAs are built in such a way that it is very difficult for any automated script to break them. In this paper, a novel approach for EZ-Gimpy CAPTCHAs has been proposed that first...