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

• Oct 2020 Our 75-page legal&tech paper accepted at TechReg legal journal!
• Oct 2020 Submitted our feedback on GDPR controllers and processors to the European Data Protection Board (EDPB).
• Jul 2020 Talk with Cristiana Santos is a runner-up for the Best HotPETs talk! [Video]
• Sep 2020 I co-chair CNIL-INRIA Privacy award 2020!
• May 2020 I serve in the PC of IEEE Security & Privacy (Oakland) 2021!
• 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

• 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.
  Accepted for publication at International Journal on Technology and Regulation, 2020.
  
  
• On Compliance of Cookie Purposes with the Purpose Specification Principle
  Imane Fouad, Cristiana Santos, Feras Al Kassar, Nataliia Bielova and Stefano Calzavara
  International Workshop on Privacy Engineering (IWPE 2020) [Video]
  
  
• Purposes in IAB Europe’s TCF: which legal basis and how are they used by advertisers?
  Célestin Matte, Cristiana Santos, Nataliia Bielova.
  Annual Privacy Forum (APF 2020).
  
  
• 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]
  Impact: NOYB issued a complaint to the CNIL using our results and our browser extension.
  Selected media coverage: Lemonde.fr, Businessinsider.fr, Nextinpact.com
  
  
• 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].
  
  
• 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-chair with François Pellegrini.
• Caspar Bowden Privacy Enhancing Technologies Award 2020, committee member.
• CNIL-INRIA Privacy Award 2019, co-chair with François Pellegrini.

Program Committee member

• IEEE S&P (Oakland) 2021, IEEE Symposium on Security and Privacy.
• PETs 2021, Privacy Enhancing Technologies Symposium.
• 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