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 …

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 …

The past few years have witnessed a boom of mobile super apps, which are the apps
offering multiple services such as e-commerce, e-learning, and e-government via miniapps …

In this paper we study the suitability of a new generation of CAPTCHA methods based on
smartphone interactions. The heterogeneous flow of data generated during the interaction …

Direct-to-consumer (DTC) genetics services are increasingly popular, with tens of millions of
customers. Several DTC genealogy services allow users to upload genetic data to search for …

We first study the suitability of behavioral biometrics to distinguish between computers and
humans, commonly named as bot detection. We then present BeCAPTCHA-Mouse, a bot …

Web bots vary in sophistication based on their purpose, ranging from simple automated
scripts to advanced web bots that have a browser fingerprint, support the main browser …

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 …

Many websites and applications rely on CAPTCHA for protection from bot attacks.
Otherwise, users and businesses will be exposed to risks. Although several different …

We introduce a novel multimodal mobile database called HuMIdb (Human Mobile
Interaction database) that comprises 14 mobile sensors acquired from 600 users. The …