English
Related papers

Related papers: An audio CAPTCHA to distinguish humans from comput…

200 papers

A CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is an automatic security mechanism used to determine whether the user is a human or a malicious computer program. It is a program that generates and…

Human-Computer Interaction · Computer Science 2013-12-31 Mohammad Jabed Morshed Chowdhury , Narayan Ranjan Chakraborty

Nowadays, CAPTCHAs are computer generated tests that human can pass but current computer systems can not. They have common usage in various web services in order to be able to detect a human from computer programs autonomously. In this way,…

Machine Learning · Computer Science 2019-01-09 Ahmet Faruk Cakmak , Muhammet Balcilar

CAPTCHAs are widely used by websites to block bots and spam by presenting challenges that are easy for humans but difficult for automated programs to solve. To improve accessibility, audio CAPTCHAs are designed to complement visual ones.…

Sound · Computer Science 2026-01-14 Ziqi Ding , Yunfeng Wan , Wei Song , Yi Liu , Gelei Deng , Nan Sun , Huadong Mo , Jingling Xue , Shidong Pan , Yuekang Li

Audio CAPTCHAs are supposed to provide a strong defense for online resources; however, advances in speech-to-text mechanisms have rendered these defenses ineffective. Audio CAPTCHAs cannot simply be abandoned, as they are specifically named…

CAPTCHAs are commonly used to distinguish between human and bot users on the web. However, despite having various types of CAPTCHAs, there are still concerns about their security and usability. To address these concerns, we surveyed over…

Cryptography and Security · Computer Science 2024-05-30 Arun Reddy , Yuan Cheng

As multimodal large language models (LLMs) advance, traditional CAPTCHAs have become obsolete at distinguishing humans from bots. To address this shift, this paper aims to investigate the possibility of using tasks for which humans have…

Cryptography and Security · Computer Science 2026-04-07 Choon-Hou Rafael Chong

CAPTCHA (Completely Automated Public Truing test to tell Computers and Humans Apart) is a widely used technology to distinguish real users and automated users such as bots. However, the advance of AI technologies weakens many CAPTCHA tests…

Machine Learning · Computer Science 2021-01-08 Rulin Shao , Zhouxing Shi , Jinfeng Yi , Pin-Yu Chen , Cho-Jui Hsieh

Completely Automated Public Turing tests to tell Computers and Humans Apart (CAPTCHAs) are a foundational component of web security, yet traditional implementations suffer from a trade-off between usability and resilience against AI-powered…

Cryptography and Security · Computer Science 2025-10-06 Ayda Aghaei Nia

Completely Automated Public Turing Test To Tell Computers and Humans Apart (CAPTCHA) has been implemented on many websites to identify between harmful automated bots and legitimate users. However, the revenue generated by the bots has…

Cryptography and Security · Computer Science 2023-06-14 Rui Jin , Lin Huang , Jikang Duan , Wei Zhao , Yong Liao , Pengyuan Zhou

The proliferation of the Internet and mobile devices has resulted in malicious bots access to genuine resources and data. Bots may instigate phishing, unauthorized access, denial-of-service, and spoofing attacks to mention a few.…

Cryptography and Security · Computer Science 2023-07-21 N. Tariq , F. A. Khan , S. A. Moqurrab , G. Srivastava

CAPTCHAs are designed to prevent malicious bot programs from abusing websites. Most online service providers deploy audio CAPTCHAs as an alternative to text and image CAPTCHAs for visually impaired users. However, prior research…

Cryptography and Security · Computer Science 2022-03-08 Md Imran Hossen , Xiali Hei

The recent emergence of deepfakes has brought manipulated and generated content to the forefront of machine learning research. Automatic detection of deepfakes has seen many new machine learning techniques, however, human detection…

Human-Computer Interaction · Computer Science 2024-08-28 Nicolas M. Müller , Karla Pizzi , Jennifer Williams

Atomizing various Web activities by replacing human to human interactions on the Internet has been made indispensable due to its enormous growth. However, bots also known as Web-bots which have a malicious intend and pretending to be humans…

Cryptography and Security · Computer Science 2011-12-26 M. Tariq Banday , N. A. Shah

In this paper the elements of the CAPTCHA usability are analyzed. CAPTCHA, as a time progressive element in computer science, has been under constant interest of ordinary, professional as well as the scientific users of the Internet. The…

Human-Computer Interaction · Computer Science 2017-07-03 Darko Brodić , Alessia Amelio , Ivo R. Draganov

As automation bot technology and Artificial Intelligence is evolving rapidly, conventional human verification techniques like voice CAPTCHAs and knowledge-based authentication are becoming less effective. Bots and scrapers with Artificial…

Cryptography and Security · Computer Science 2025-11-12 Aditya Mitra , Sibi Chakkaravarthy Sethuraman , Devi Priya V S

CAPTCHA(Completely Automated Public Turing test to Tell Computers and Humans Apart) can be used to protect data from auto bots. Countless kinds of CAPTCHAs are thus designed, while we most frequently utilize text-based scheme because of…

Computer Vision and Pattern Recognition · Computer Science 2018-06-20 Ye Wang , Mi Lu

Completely Automated Public Turing Test To Tell Computers and Humans Apart (CAPTCHA) is a type of challenge-response test widely used in authentication systems. A well-known challenge it faces is the CAPTCHA farm, where workers are hired to…

Cryptography and Security · Computer Science 2023-12-19 Rui Jin , Yong Liao , Pengyuan Zhou

As a result of continuing advances in computer capabilities, it is becoming increasingly difficult to distinguish between humans and computers in the digital world. We propose using the fundamental human ability to distinguish between…

Cryptography and Security · Computer Science 2019-07-09 Nasser Mohammed Al-Fannah

CAPTCHA is a human-centred test to distinguish a human operator from bots, attacking programs, or other computerised agents that tries to imitate human intelligence. In this research, we investigate a way to crack visual CAPTCHA tests by an…

Computer Vision and Pattern Recognition · Computer Science 2020-06-26 Zahra Noury , Mahdi Rezaei

CAPTCHAs have long been essential tools for protecting applications from automated bots. Initially designed as simple questions to distinguish humans from bots, they have become increasingly complex to keep pace with the proliferation of…

Cryptography and Security · Computer Science 2025-02-25 Ziqi Ding , Gelei Deng , Yi Liu , Junchen Ding , Jieshan Chen , Yulei Sui , Yuekang Li
‹ Prev 1 2 3 10 Next ›