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22 lip 2023 · In this work, we explore CAPTCHAs in the wild by evaluating users' solving performance and perceptions of unmodified currently-deployed CAPTCHAs.
1 gru 2016 · To address the challenges in Web security based on CAPTCHA, we firstly analyze drawbacks, attack strategies and breaking methods of traditional CAPTCHAs, and propose a novel CAPTCHA...
To investigate whether the bots can solve the captcha better than human beings, an online captcha solving program to compare the success rates of human labors and bots is desired. In this paper, we conduct a comprehensive study of re-Captcha v2.
A CAPTCHA (1, 2) is a challenge-response test used in the World Wide Web to determine whether a user is a human or a computer. The acronym stands for Completely Automated Public Turing test to tell Computers and Humans Apart. A typical CAPTCHA is an image containing several distorted characters that appears at the bottom of Web registration forms.
25 mar 2021 · We first summarize existing text-based CAPTCHAs using a newly proposed taxonomy based on their resistance mechanisms and systematically review corresponding attacks in terms of methods and...
1 paź 2010 · This paper examined the security of six widely used types of CAPTCHA and present novel attacks against all of them and devised novel and successful attacks against BotDetect's Wavy chess, reCAPTCHA, and a new variant of the Wikipedia scheme.
This paper reviews critically over fifty article publications that shows the current trends in the area of the CAPTCHA scheme, its development and recognition mechanisms and the way forward in helping to ensure a robust and yet secure CAPTCHA development in guiding future research endeavor in the subject domain. See full PDF. download Download PDF.
