Social bots represent a new generation of bots that make use of online social networks
(OSNs) as command and control (C&C) channels. Malicious social bots have been used as …

Text-based CAPTCHA has become one of the most popular methods for preventing bot
attacks. With the rapid development of deep learning techniques, many new methods to …

Central banks around the world are exploring and in some cases even piloting Central Bank
Digital Currencies (CBDCs). CBDCs promise to realize a broad range of new capabilities …

Reproducibility is crucial to the advancement of science; it strengthens confidence in
seemingly contradictory results and expands the boundaries of known discoveries …

Online social networks are plagued by fake information. In particu-lar, using massive fake
accounts (also called Sybils), an attacker can disrupt the security and privacy of benign …

In recent years, significant advances have been gained in visual detection, and an
abundance of outstanding models have been proposed. However, state-of-the-art object …

Machine learning has been widely applied to building security applications. However, many
machine learning models require the continuous supply of representative labeled data for …

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 …

Attention check questions have become commonly used in online surveys published on
popular crowdsourcing platforms as a key mechanism to filter out inattentive respondents …

Creative AI (notably GANs and VAEs) can generate convincing fakes of video footage,
pictures, graphics, etc. In order to conceptualize the societal role of creative AI a new …