A systematic survey on CAPTCHA recognition: types, creation and breaking techniques
CAPTCHA stands for Completely Automated Public Turing Test to Tell Computers and
Human Apart. CAPTCHA is used for internet security. A few CAPTCHA schemes are …
Human Apart. CAPTCHA is used for internet security. A few CAPTCHA schemes are …
An efficient technique for breaking of coloured Hindi CAPTCHA
Cyber-attacks on the internet are not a new phenomenon. Hackers are always looking for
ways to breach the security of the internet. Good researchers continuously develop solutions …
ways to breach the security of the internet. Good researchers continuously develop solutions …
CAPTCHA design and security issues
The concept of reverse Turing tests, or more commonly known as CAPTCHAs, for
distinguishing between humans and computers has been around for many years. The …
distinguishing between humans and computers has been around for many years. The …
Semi-supervised deep learning approach to break common CAPTCHAs
Manual data annotation is a time consuming activity. A novel strategy for automatic training
of the CAPTCHA breaking system with no manual dataset creation is presented in this …
of the CAPTCHA breaking system with no manual dataset creation is presented in this …
Breaking an animated CAPTCHA scheme
CAPTCHAs have become a ubiquitous security countermeasure to protect online web-
services against automated attacks. However, attackers have managed to successfully …
services against automated attacks. However, attackers have managed to successfully …
A Survey of Adversarial CAPTCHAs on its History, Classification and Generation
Completely Automated Public Turing test to tell Computers and Humans Apart, short for
CAPTCHA, is an essential and relatively easy way to defend against malicious attacks …
CAPTCHA, is an essential and relatively easy way to defend against malicious attacks …
Dotcha: A 3d text-based scatter-type captcha
We introduce a new type of 3D text-based CAPTCHA, called DotCHA, which relies on
human interaction. DotCHA asks users to rotate a 3D text model to identify the correct letters …
human interaction. DotCHA asks users to rotate a 3D text model to identify the correct letters …
A CAPTCHA scheme based on the identification of character locations
CAPTCHAs are a standard security mechanism used on many websites to protect online
services against abuse by automated programs, or bots. The purpose of a CAPTCHA is to …
services against abuse by automated programs, or bots. The purpose of a CAPTCHA is to …
A challenge-response mechanism for securing online social networks against social bots
T Mohamed, M Ali, I Hani - International Journal of Ad Hoc …, 2019 - inderscienceonline.com
Social bots is fast becoming a serious security threat to online social networks (OSNs).
Social bots are automated software tools able to execute malicious activities in OSNs …
Social bots are automated software tools able to execute malicious activities in OSNs …
Directcha: A proposal of spatiometric mental rotation CAPTCHA
A Sano, M Fujita, M Nishigaki - 2016 14th Annual Conference …, 2016 - ieeexplore.ieee.org
A 3D CAPTCHA using mental rotation, called YUNiTi CAPTCHA, has been proposed as an
advanced system to enable discrimination between computers and humans. YUNiTi …
advanced system to enable discrimination between computers and humans. YUNiTi …