All Stories

  1. PIIxel Leaks: Passive Identification of Personally Identifiable Information Leakage through Meta Pixel

    Article • November 2025, ACM (Association for Computing Machinery)

    Nicolas Kourtellis, Panagiotis Papadopoulos

  2. Before & After: The Effect of EU's 2022 Code of Practice on Disinformation

    Article • April 2025, ACM (Association for Computing Machinery)

    Nicolas Kourtellis, Panagiotis Papadopoulos

  3. Welcome to the Dark Side: Analyzing the Revenue Flows of Fraud in the Online Ad Ecosystem

    Article • April 2025, ACM (Association for Computing Machinery)

    Panagiotis Papadopoulos, Nicolas Kourtellis

  4. Ad Laundering: How Websites Deceive Advertisers into Rendering Ads Next to Illicit Content

    Article • May 2024, ACM (Association for Computing Machinery)

    Panagiotis Papadopoulos

  5. Not only E.T. Phones Home: Analysing the Native User Tracking of Mobile Browsers

    Article • October 2023, ACM (Association for Computing Machinery)

    Panagiotis Papadopoulos

  6. The Hitchhiker’s Guide to Facebook Web Tracking with Invisible Pixels and Click IDs

    Article • April 2023, ACM (Association for Computing Machinery)

    Panagiotis Papadopoulos

  7. Who Funds Misinformation? A Systematic Analysis of the Ad-related Profit Routines of Fake News Sites

    Article • April 2023, ACM (Association for Computing Machinery)

    Panagiotis Papadopoulos

  8. YouTubers Not madeForKids: Detecting Channels Sharing Inappropriate Videos Targeting Children

    Article • June 2022, ACM (Association for Computing Machinery)

    Panagiotis Papadopoulos

  9. YourAdvalue

    Article • ACM SIGMETRICS Performance Evaluation Review, June 2022, ACM (Association for Computing Machinery)

    Panagiotis Papadopoulos

  10. YourAdvalue

    Article • June 2022, ACM (Association for Computing Machinery)

    Panagiotis Papadopoulos

  11. Leveraging Google’s Publisher-Specific IDs to Detect Website Administration

    Article • April 2022, ACM (Association for Computing Machinery)

    Panagiotis Papadopoulos

  12. The Cost of Digital Advertisement

    Article • January 2018, ACM (Association for Computing Machinery)

    Panagiotis Papadopoulos

  13. Privacy analysis of the two counterparts of the same online service: Mobile Websites vs Mobile Apps

    Article • April 2017, ACM (Association for Computing Machinery)

    Panagiotis Papadopoulos

  14. Securing Legacy Code with the TRACER Platform

    Article • October 2014, ACM (Association for Computing Machinery)

    Panagiotis Papadopoulos, Diomidis Spinellis