Mahmood Sharif

“I Have No Idea What a Social Bot Is”: On Users’ Perceptions of Social Bots and Ability to Detect Them

2022

Social bots—software agents controlling accounts on online social networks (OSNs)—have been employed for various malicious purposes, including spreading disinformation and scams. Understanding user perceptions of bots and ability to distinguish them from other accounts can …

CaFA: Cost-aware, Feasible Attacks With Database Constraints Against Neural Tabular Classifiers

2024

This work presents CaFA, a system for Cost-aware Feasible Attacks for assessing the robustness of neural tabular classifiers against adversarial examples realizable in the problem space, while minimizing adversaries’ effort. To this end, CaFA leverages …