Gotta CAPTCHA'Em all: a survey of 20 Years of the human-or-computer Dilemma

M Guerar, L Verderame, M Migliardi… - ACM Computing …, 2021 - dl.acm.org
A recent study has found that malicious bots generated nearly a quarter of overall website
traffic in 2019 [102]. These malicious bots perform activities such as price and content …

Recent advances of Captcha security analysis: a short literature review

NT Dinh, VT Hoang - Procedia Computer Science, 2023 - Elsevier
CAPTCHA has long been used to keep bots from misusing web services. Various CAPTCHA
schemes have been proposed over the years, principally to increase usability and security …

Research on deep learning techniques in breaking text-based captchas and designing image-based captcha

M Tang, H Gao, Y Zhang, Y Liu… - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
The ability of hackers to infiltrate computer systems using computer attack programs and
bots led to the development of Captchas or Completely Automated Public Turing Tests to …

New cognitive deep-learning CAPTCHA

ND Trong, TH Huong, VT Hoang - Sensors, 2023 - mdpi.com
CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart),
or HIP (Human Interactive Proof), has long been utilized to avoid bots manipulating web …

A survey of research on captcha designing and breaking techniques

Y Zhang, H Gao, G Pei, S Luo… - 2019 18th IEEE …, 2019 - ieeexplore.ieee.org
The Internet plays an increasingly important role in people's lives, but it also brings security
problems. CAPTCHA, which stands for Completely Automated Public Turing Test to Tell …

Style matching CAPTCHA: Match neural transferred styles to thwart intelligent attacks

P Ray, A Bera, D Giri, D Bhattacharjee - Multimedia Systems, 2023 - Springer
Completely automated public turing test to tell computers and humans apart (CAPTCHA) is
widely used to prevent malicious automated attacks on various online services. Text-and …

Human-artificial intelligence approaches for secure analysis in CAPTCHA codes

N Dinh, L Ogiela - EURASIP Journal on Information Security, 2022 - Springer
Abstract CAPTCHA (Completely Automated Public Turing test to tell Computers and
Humans Apart) has long been used to keep automated bots from misusing web services by …

Improving the security of audio captchas with adversarial examples

P Wang, H Gao, X Guo, Z Yuan… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
CAPTCHAs (completely automated public Turing tests to tell computers and humans apart)
have been the main protection against malicious attacks on public systems for many years …

Image‐based CAPTCHAs based on neural style transfer

Z Cheng, H Gao, Z Liu, H Wu, Y Zi… - IET Information …, 2019 - Wiley Online Library
Over the last few years, completely automated public turing test to tell computers and
humans apart (CAPTCHA) has been used as an effective method to prevent websites from …

Image CAPTCHAs: When Deep Learning Breaks the Mold

M Moradi, M Moradi, S Palazzo, F Rundo… - IEEE …, 2024 - ieeexplore.ieee.org
While text-based CAPTCHAs have been the predominant type of human interaction proofs
(HIPs) for many years, image recognition challenges have also gained significant attention …