About
Welcome!
I am a postdoctoral researcher at NYU Tandon School of Engineering in Damon McCoy's team. I obtained my PhD in Sorbonne Université (while being based in EURECOM), under the supervision of Patrick Loiseau & Oana Goga.
I acquired my Diploma (5 years) in Electrical and Computer Engineering at the NTUA. I also have a MSc in Communications & Computer Security from EURECOM.
I am broadly interested in security and privacy, AI and society, internet measurements, transparency and interpretability, and e-crime.
News
April 2026. Our paper Caught in a Mafia Romance: How Users Explore Intimate Narratives with Chatbots was accepted at CHI 2026. Congrats to Julia!
July 2025. Our PETS 2025 paper Tracker Installations Are Not Created Equal: Understanding Tracker Configuration of Form Data Collection received the Andreas Pfitzmann Best Student Paper Award, and the associated poster of our PETS 2025 paper More and Scammier Ads: The Perils of YouTube's Ad Privacy Settings received the Best Poster Award. Congrats to Julia and Cat!
September 2023. I started working as a postdoctoral researcher at NYU Tandon School of Engineering in Damon McCoy's team.
Publications
International Refereed Conferences
Caught in a Mafia Romance: How Users Explore Intimate Narratives with Chatbots
J. Kieserman, C. Mai, S. Lignell, L. Qin, A. Andreou, D. McCoy, R. Bellini
CHI 2026 (ACM CHI Conference on Human Factors in Computing Systems)
More and Scammier Ads: The Perils of YouTube's Ad Privacy Settings
C. Mai, B. Coelho, J. Kieserman, L. Matsumoto, K. Spinelli, E. Yang, A. Andreou, R. Greenstadt, T. Lauinger, D. McCoy
PoPETs 2025 (Proceedings on Privacy Enhancing Technologies)
Winner of the Best Poster Award for the associated poster
Tracker Installations Are Not Created Equal: Understanding Tracker Configuration of Form Data Collection
J. Kieserman, A. Andreou, C. Geeng, T. Lauinger, D. McCoy
PoPETs 2025 (Proceedings on Privacy Enhancing Technologies)
Winner of the Andreas Pfitzmann Best Student Paper Award
Collaborative Ad Transparency: Promises and Limitations
E. Gkiouzepi, A. Andreou, O. Goga, P. Loiseau
IEEE S&P 2023 (IEEE Symposium on Security and Privacy)
Facebook Ads Monitor: An Independent Auditing System for Political Ads on Facebook
M. Silva, L. Santos de Oliveira, A. Andreou, PO. Vaz de Melo, O. Goga, F. Benevenuto
WWW 2020 (The Web Conference)
Honorable Mention Paper at WWW 2020
Winner of the 2020 CNIL-Inria Award for Privacy Protection
Measuring the Facebook Advertising Ecosystem
A. Andreou, M. Silva, F. Benevenuto, O. Goga, P. Loiseau, A. Mislove
NDSS 2019 (The Network and Distributed System Security Symposium)
Auditing Data Brokers' Advertising Interfaces: Privacy Risks with Facebook's PII-based Targeting
G. Venkatadri, A. Andreou, Y. Liu, A. Mislove, K. Gummadi, P. Loiseau, O. Goga
IEEE S&P 2018 (IEEE Symposium on Security and Privacy Symposium)
Runner-up for the Caspar Bowden PET award for outstanding research in privacy enhancing technologies
Press coverage: WIRED The Telegraph Siècle digital Naked Security
Investigating Ad Transparency Mechanisms in Social Media: A Case Study of Facebook's Explanations
A. Andreou, G. Venkatadri, O. Goga, K. Gummadi, P. Loiseau, A. Mislove
NDSS 2018 (The Network and Distributed System Security Symposium)
Runner-up for the 2019 CNIL-Inria Award for Privacy Protection
Press coverage: The Guardian QUARTZ Bloomberg Businessweek ABC
Identity vs. Attribute Disclosure Risks for Users with Multiple Social Profiles
A. Andreou, O. Goga, P. Loiseau
ASONAM 2017 (IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining) (17.2% acceptance rate)
Best paper award runner-up
International Refereed Workshops
Reckless Designs and Broken Promises: Privacy Implications of Targeted Interactive Advertisements on Social Media Platforms
J. Kieserman, A. Andreou, L. Edelson, S. Siby, D. McCoy
ConPro 2026 (Workshop on Technology and Consumer Protection, co-located with IEEE S&P)
Assessing the coverage of data collection campaigns on Twitter: A case study
V. Plachouras, Y. Stavrakas, A. Andreou
OTM 2013 (Confederated International Conferences "On the Move to Meaningful Internet Systems")
Thesis
Auditing, Measuring, and Bringing Transparency to Social Media Advertising Ecosystems
A. Andreou
Sorbonne Université 2019
Tools
AdAnalyst
A tool to help you make sense of the ads you receive on Facebook. This tool enabled our NDSS 2018, NDSS 2019, WWW 2020, and IEEE S&P 2023 studies.
Note: AdAnalyst is no longer actively maintained and is currently unavailable.
Affiliations
