As the Internet has transformed into a critical infrastructure, society has become more
vulnerable to its security flaws. Despite substantial efforts to address many of these …

We present, GEM, the first heterogeneous graph neural network approach for detecting
malicious accounts at Alipay, one of the world's leading mobile cashless payment platform …

Recommender system is an important component of many web services to help users locate
items that match their interests. Several studies showed that recommender systems are …

abstract As the Internet has transformed into a critical infrastructure, society has become
more vulnerable to its security flaws. Despite substantial efforts to address many of these …

Training machine learning (ML) models is expensive in terms of computational power,
amounts of labeled data and human expertise. Thus, ML models constitute business value …

Compromising social network accounts has become a profitable course of action for
cybercriminals. By hijacking control of a popular media or business account, attackers can …

Online meeting tools like Zoom and Google Meet have become central to our professional,
educational, and personal lives. This has opened up new opportunities for large scale …

Growing evidence points to recurring influence campaigns on social media, often sponsored
by state actors aiming to manipulate public opinion on sensitive political topics. Typically …

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 …

seek to influence and polarize political topics through massive coordinated efforts. In the
process, these efforts leave behind artifacts, which researchers have leveraged to analyze …