For nearly two decades, CAPTCHAS have been widely used as a means of protection
against bots. Throughout the years, as their use grew, techniques to defeat or bypass …

Abstract Convolutional Neural Networks have achieved state-of-the-art performance in
image classification. Their lack of ability to recognise the spatial relationship between …

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 …

mCaptcha: Replacing Captchas with Rate limiters to Improve Security and Accessibility |
Communications of the ACM skip to main content ACM Digital Library home ACM Association …

Nowadays, almost all major websites employ CAPTCHAs. This prevents website scraping,
fake account creation as well as DDoS or bruteforce attacks. For anonymity reasons …

Bots constitute a significant portion of Internet traffic and are a source of various issues
across multiple domains. Modern bots often become indistinguishable from real users, as …

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 …

Введение. С быстрым развитием интернет-технологий проблемы сетевой
безопасности продолжают обостряться. Так одним из наиболее распространенных …

Text-based CAPTCHA is widely used in fields such as user identity verification during
human-computer interaction in real scenarios. With the development of artificial intelligence …

Currently, Turing tests (notably in the form of CAPTCHAs) are used as a claimed barrier
against bots on the Internet. During the last 20+ years, both CAPTCHAs and attacks against …