I am a full-time Research Scientist (CRCN, equivalent to Associate Professor) at Inria Sophia Antipolis, in the PRIVATICS team.

I take an inter-disciplinary approach combining computer science and law. I am interested in a wide range of privacy problems including

• Studying legal GDPR and ePrivacy requirements for web tracking and consent
• Detecting new web tracking technologies
• Measuring web privacy in large scale experiments
• Detecting privacy vulnerabilities in Web browsers and websites
• Informing policy makers of gaps between law and technology

See more information and motivational "About" page on my LinkedIn page.

Recent news

• Dec 2020 Paper with Colin M. Gray and Cristiana Santos is accepted at ACM CHI 2021!
• Dec 2020 Paper with Cristiana Santos published at TechReg legal journal!
• Dec 2020 Happy to share our feedback with Cristiana Santos to the Italian DPA ‘Garante Privacy’.
• Oct 2020 Submitted our feedback on GDPR controllers and processors to the EDPB.
• Sep 2020 I co-chair CNIL-INRIA Privacy award 2020!
• Apr 2020 Paper accepted at IWPE 2020!
• Mar 2020 Paper accepted at APF 2020!
• Feb 2020 Submitted our opinion on the draft recommendation of the CNIL on "cookies and other trackers".
• Feb 2020 Paper accepted at IEEE Security & Privacy 2020!
• Jan 2020 Survey on fingerprinting is accepted at ACM TWEB!
• Nov 2019 Invited talk at the Mozilla Security Research Summit 2019.
• Nov 2019 Paper accepted at PETs 2020!

Selected publications

• Dark Patterns and the Legal Requirements ofConsent Banners: An Interaction Criticism Perspective
  Colin M. Gray, Cristiana Santos, Nataliia Bielova, Michael Toth, Damian Clifford.
  ACM CHI Conference on Human Factors in Computing Systems (ACM CHI 2021) Accepted for publication.
  
  
• Do Cookie Banners Respect my Choice? Measuring Legal Compliance of Banners from IAB Europe’s Transparency and Consent Framework
  Célestin Matte, Nataliia Bielova, Cristiana Santos.
  IEEE Symposium on Security and Privacy (IEEE S&P 2020). [Video] [BIB]
  Impact: NOYB issued a complaint to the CNIL using our results and our browser extension.
  Selected media coverage: Lemonde.fr, Businessinsider.fr, Nextinpact.com
  
  
• Are cookie banners indeed compliant with the law? Deciphering EU legal requirements on consent and technical means to verify compliance of cookie banners.
  Cristiana Santos, Nataliia Bielova and Célestin Matte.
  International Journal on Technology and Regulation (TechReg), 2020. [LINK] [BIB]
  
  
• Missed by Filter Lists: Detecting Unknown Third-Party Trackers with Invisible Pixels
  Imane Fouad, Nataliia Bielova, Arnaud Legout, Natasa Sarafijanovic-Djukic.
  Privacy Enhancing Technologies (PoPETS 2020). [Video] [BIB]
  
  
• Browser Fingerprinting: A survey.
  Pierre Laperdrix, Nataliia Bielova, Benoit Baudry and Gildas Avoine.
  ACM Transactions on the Web ( ACM TWEB), 2020.
  
  
• ... full list of publications

Projects

Current research projects

• ANR JCJC PrivaWeb Privacy Protection and ePrivacy Compliance for Web Users (2018-2022, scientific coordinator)
• Inria DATA4US Personal DAta TrAnsparency for web USers (2020-2022, scientific coordinator)
• BPI ANSWER Advanced aNd Secured Web Experience and seaRch (2018-2020)

Past projects

• ANR CISC Analyses of JavaScript Applications: Certification and Security (2014-2019)
• Inria Action Marquante User discrimination on the Web: measurement, causation and prevention (2016-2017, co-PI)

Recent activities

Award Commitee

• CNIL-INRIA Privacy Award 2020, Co-President with François Pellegrini (CNIL).
• Caspar Bowden Privacy Enhancing Technologies Award 2020, committee member.
• CNIL-INRIA Privacy Award 2019, Co-President with François Pellegrini (CNIL).

Program Committee member

• IEEE S&P (Oakland) 2021, IEEE Symposium on Security and Privacy.
• PETs 2021, Privacy Enhancing Technologies Symposium.
• ConPro 2021, Workshop on Technology and Consumer Protection.
• MADWeb 2021, Workshop on Measurements, Attacks, and Defenses for the Web.
• TheWeb 2020, Security and Privacy Track of TheWeb Conference.
• PETs 2020, Privacy Enhancing Technologies Symposium.
• PETs 2019, Privacy Enhancing Technologies Symposium.
• IEEE SecDev 2019, IEEE Secure Development Conference.
• IEEE EuroS&P 2019, IEEE European Symposium on Security and Privacy.
• MADWeb 2019, NDSS Workshop on Measurements, Attacks, and Defenses for the Web.
• ... full list of service