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

I am interested in a wide range of privacy problems both from computer science and law perspectives. I'm working on

• Detecting new web tracking technologies
• Measuring web privacy in large scale experiments
• GDPR, ePrivacy directive and upcoming ePrivacy Regulation
• Web browser and Web application security mechanisms

Recent news

• Jul 2020 Our talk "I see a cookie banner -- is it even legal?" with Cristiana Santos is a runner-up for the Best HotPETs talk! [Slides]
• May 2020 I serve in the PC of IEEE Security & Privacy (Oakland) 2021!
• Apr 2020 Our paper on compliance of cookie purposes has been accepted to IWPE 2020! Congrats, Imane and Cristiana!
• Mar 2020 Our paper on purposes in IAB Europe TCF got accepted at APF 2020! Congrats, Celestin and Cristiana!
• Feb 2020 We have written a our opinion on the draft recommendation of the CNIL on "cookies and other trackers".
• Feb 2020 Our paper on cookie banners got accepted at IEEE Security & Privacy 2020! Congrats, Celestin!
• Jan 2020 Our survey on browser fingerprinting is accepted at ACM TWEB! Congrats, Pierre, Benoit and Gildas!
• Nov 2019 I gave an invited talk at the Mozilla Security Research Summit 2019.
• Nov 2019 Our paper on tracking missed by the filter lists accepted at PETs 2020! Congrats, Imane!
• Sep 2019 Our paper on a legal-technical approach to compliance with EU laws on cookies is accepted at PLSC Europe 2019!
• Sep 2019 I serve in the PC of the Security and Privacy Track of TheWeb conference 2020!
• Jul 2019 Together with Cedric Lauradoux, we got a DATA4US project accepted under Inria "Exploratory actions" program.
• Jul 2019 I gave a keynote at the French Privacy workshop APVP 2019.
• Jun 2019 I co-chair CNIL-INRIA Privacy award 2019!
• Jun 2019 I serve in the PC/Editorial Board of PETs 2020!
• May 2019 I wrote my first blog post "We need science-driven journalism". Have a look!

Selected publications

• 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)
  
  
• 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).
  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).
  
  
• Browser Fingerprinting: A survey.
  Pierre Laperdrix, Nataliia Bielova, Benoit Baudry and Gildas Avoine.
  ACM Transactions on the Web ( ACM TWEB), 2020.
  
  
• Security Analysis of Subject Access Request Procedures.
  Coline Boniface, Imane Fouad, Nataliia Bielova, Cédric Lauradoux, and Cristiana Santos.
  Annual Privacy Forum (APF 2019).
  
  
• To Extend or not to Extend: on the Uniqueness of Browser Extensions and Web Logins
  Gábor György Gulyás, Dolière Francis Somé, Nataliia Bielova and Claude Castelluccia.
  Workshop on Privacy in the Electronic Society (WPES 2018) at ACM CCS 2018.
  Media coverage: CNIL, TheRegister.co.uk, and DCloudNews.
  
  
• ... 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

• Caspar Bowden Privacy Enhancing Technologies Award 2020, committee member.
• CNIL-INRIA Privacy Award 2020, 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.
• 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