dmarques@di.fc.ul.pt

Diogo Marques

PhD Student

I’m a PhD candidate and HCI researcher, specializing in usable security and privacy. Currently, my research is focused on understanding unauthorized access to mobile devices.

I also regularly work on HCI methodology, and other HCI application areas, like accessibility.

I’m advised by Luis Carriço and Tiago Guerreiro.

Publications

Vulnerability & Blame: Making Sense of Unauthorized Access to Smartphones

Diogo Marques, Tiago Guerreiro, Luís Carriço, Ivan Beschastnikh, Konstantin Beznosov

CHI 2019 ‑ ACM Conference on Human Factors in Computing Systems, Glasgow, Scotland, May, 2019

Characterizing Social Insider Attacks on Facebook

Wali Usmani, Diogo Marques, Ivan Beschastnikh, Konstantin Beznosov, Tiago Guerreiro, Luís Carriço

CHI 2017 ‑ In the ACM Conference on Human Factors in Computing Systems, Denver, Colorado, USA, May

Snooping on Mobile Phones: Prevalence and Trends

Diogo Marques, Ildar Muslukhov, Tiago Guerreiro, Konstantin Beznosov, Luís Carriço

SOUPS 2016 ‑ In the Twelfth Symposium on Usable Privacy and Security, USA, June, 2016

Projects

Storyboard demonstrating a shower attack.

Unauthorized Access to Smartphones

Unlike unlock authentication, which is an active defense against physical intrusion, passive defenses aim to primarily provide awareness, traceability, and recovery from intrusions; and to only secondarily engage counter-measures like blocking access. In sensitive computer systems, passive security is embodied in Intrusion Detection and Response (IDR) systems. To end-users, however, parallel capabilities remain unavailable, or lack security and usability validation, despite the severe privacy implications of intrusions. We thus envision a mobile IDR which is usable by individuals with no technical training; which can detect suspicious activity based on semantics of intrusion behavior; and which can respond to threats per their importance.