Counteracting dark Web text-based CAPTCHA with generative adversarial learning for proactive cyber threat intelligence

N Zhang, M Ebrahimi, W Li, H Chen - ACM Transactions on …, 2022 - dl.acm.org
Automated monitoring of dark web (DW) platforms on a large scale is the first step toward
developing proactive Cyber Threat Intelligence (CTI). While there are efficient methods for …

Chinese character CAPTCHA recognition and performance estimation via deep neural network

D Lin, F Lin, Y Lv, F Cai, D Cao - Neurocomputing, 2018 - Elsevier
To identify machine and human, Completely Automated Public Turing test to tell Computers
and Humans Apart (CAPTCHA) is increasingly used in many web applications. The classical …

A survey of CAPTCHA technologies to distinguish between human and computer

X Xu, L Liu, B Li - Neurocomputing, 2020 - Elsevier
Abstract CAPTCHA, Completely Automated Public Turing test to tell Computers and Humans
Apart, is widely used as a security mechanism to classify human and computer. This security …

Enhancing website security against bots, spam and web attacks using lCAPTCHA

S Vaithyasubramanian, D Lalitha… - … Journal of Computers …, 2023 - Taylor & Francis
In digital technological advancement, websites are developed and set live to render service
and information for users. To protect web resources from computerized programs, which …

A novel CAPTCHA scheme based on facial expression reconstruction

M Moradi, MR Keyvanpour - International Journal of …, 2020 - inderscienceonline.com
Despite some technical and conceptual criticism on the CAPTCHA and its claimed
effectiveness, such human interaction proofs (HIPs) are still in the centre of attention. With …

Authentication using facial recognition

A Avital - US Patent 9,547,763, 2017 - Google Patents
707 736 8,091,120 B2 1/2012 Perrella et al. 8,621,586 B1 12/2013 Peer et al. user score for
that face image,(e) comparing the received user score for each face image of the set to the …

Fp-captcha: An improved captcha design scheme based on face points

P Ray, D Giri, S Kumar, P Sahoo - Recent Advances in Intelligent …, 2020 - Springer
Captcha's are random significant challenges, used to differentiate between humans and
bots in order to prevent unauthorized access to web services. Over a decade lots of research …

[PDF][PDF] A Study of Captcha Techniques and Development of SUPER Captcha for Secured Web Transactions

M Subramanyam, V Priya - International Journal of Applied …, 2015 - researchgate.net
Today's online services are vulnerable by malicious programs which would illegally gain
authorizations at the expense of legitimate human users. Completely Automated Public …

[PDF][PDF] Array CAPTCHAs (completely automated public turing test to tell computer and human apart)

S Vaithyasubramanian - Asia Life Sci-Asian Int J Life Sci, 2017 - researchgate.net
Since the start of the Internet, numerous users have endeavored to abuse websites for both
amusement and advantage. As the misuse got to be beneficial, the size of misuse …

3D Socio Graphical CAPTCHA based on reCAPTCHA against spammers and bots

SS Rane, N Shekokar - 2016 IEEE International Conference on …, 2016 - ieeexplore.ieee.org
Website security is a major concern in today's world. CAPTCHA are used to protect websites
from spammers, bots and unauthorized users. Different types of CAPTCHA are text …