Vincent Roca @ Inria


November 2019: PRIVATICS leadership

I have been appointed leader of the PRIVATICS Inria research team, starting on November 2019. This is a great honnor and a true challenge to be named as successor to Claude Castelluccia. Thanks a lot, everybody, for your trust.


January 2019: Our Inria white book on cybersecurity (EN) is now available
LB-CS illustration

With Steve Kremer, Ludovic Mé, and Didier Remy, we, authors, coordinated the writing of Inria's white book on cybersecurity, issued on January 2019. It provides a survey of academic research in cybersecurity and privacy, covering most of the sub-domains, and illustrating it with a map of Inria research teams in the domain (yes, it's an Inria document).
If your're looking for an overview of research in this huge domain, if you're looking for partners or experts, or if you're just curious to know what's going on in the academic world, do not hesitate, you'll probably find interesting pointers in this book. And we wrote it in order to enable multiple levels of reading.

For more information:
Inria news: "Les bilans et défis scientifiques en cybersécurité (FR)"
Link to the book: "Cybersecurity: current challenges and Inria's research directions" (EN)


November 2018: "Protection de la vie privée dans le monde numérique"/"Privacy in the digital world" MOOC
MOOC illustration

After the great success of the session 1 of our MOOC on "Privacy in the digital world" (14,006 registered participants, which is the highest score all Inria MOOC considered, and a very active forum), here is the time for session 2...
A participant said earlier this year: "Ce cours devrait etre déclaré d'utilité publique, diffusé dans toutes les écoles, voire fourni avec chaque smartphone et ordinateur."

For more information:
MOOC presentation (French)
Vidéo de présentation (French)


July 2017: "Re-launch of the NWCRG IRTF research group"
IRTF logo

Along with Marie-Jose Montpetit, we have re-launched the "Coding for Efficient Network Communications" NWCRG research group of IRTF.
The goal is to research FEC and Network Coding principles and methods that can benefit Internet communication, in strong relationship with IETF.

For more information:
the datatracker contains official information, meeting minutes, and all documents.
our GitHub repositories contain the most up-to-date content related to our research group activities.


October 2016: Making the smartphone eco-system more respectful of user's privacy is possible: Inria-Eurecom and the FTC Inmobi settlement!
Jagdish Achara PhD FTC Inmobi settlement

In 2014 we identified Inmobi as a company abusing the Android very permissive ACCESS_WIFI_STATE in order to geolocalize users without their knowledge nor permission. June 2016's FTC settlement against Inmobi confirmed our discovery. Yes, our work in Mobilitics/CAPPRIS triggered this settlement.

Last but not least, soon after this settlement, Google finally decided to protect this feature with a geolocation explicit permission... whereas they were aware of this possibility since the beginning.

Learn more about this and other tools that help build a better Internet in Jagdish Achara's PhD thesis (in English) that I co-supervised.


October 2015: "Les Nouvelles Vagues" (France Culture) interview on privacy leaks in smartphones
Vincent Roca at France Culture

New communication on the output of the Mobilitics project: I gave an interview in the radio program "Les Nouvelles Vagues" from Marie Richeux, France Culture. With Interstice, we also published a podcast on the same topic one month before.

For more information and access to the full record of the interview:
France Culture podcast (59', in French)
Interstice podcast (13', in French)
On the recent invalidation by the European Court of Justice of the "Safe Harbor" program that used to enabled several US companies to collect our personal data: Invalidation du "Safe Harbor" par la Cour de Justice de l'Union européenne : une décision clé pour la protection des données (in French)


Picture is (c) Copyright 2015 France Culture

December 2014: Inria-CNIL press conference to introduce the latest results of the Mobilitics project
CNIL-Inria press conference picture

On December 15th, a joint Inria - CNIL (the French data protection agency) press conference was held at CNIL premises to introduce the latest results of the Mobilitics project that focuses on privacy and smartphones. This press conference, focusing on Android, follows that of April 2013 that was limited to iOS.

For more information:
Mobilitics, saison 2 : nouvelle plongée dans l'univers des smartphones et de leurs applications" (in French)
Lettre IP8 : Mobilitics, saison 2 : Les smartphones et leurs apps sous le microscope de la CNIL et d'Inria (in French)
Wifileaks: Underestimated Privacy Implications of the ACCESS_WIFI_STATE Android Permission (in English)


Picture is (c) Copyright 2014 01Business

October 2014: Awarded the 3rd Applied Research price of the FIEEC
FIEEC Applied Research price picture FIEEC Applied Research price

I have been awarded the Third Applied Research price of the FIEEC (Fédération des Industries Electriques, Electroniques et Communication" on October 8th, 2014, for my transfer activities to the Expway French SME.

For more information, see the FIEEC page.


Right picture is (c) Copyright 2014, FIEEC, credits: L. Benevello


June 2014: Vincent's Habilitation à Diriger des Recherches (HDR) public defense

My Habilitation à Diriger des Recherches (HDR) public defense took place on Thursday June 19th, 2014, in the Inria Rhône-Alpes premises, Montbonnot.

``Codes AL-FEC et protocoles de diffusion robuste de contenus : composants pour des services performants et passant à l'échelle''
``AL-FEC codes and robust content distribution protocols: components for high performance and scalable services'' (in French)


Ce document discute de la fourniture de services de diffusion où des contenus de toute nature doivent être transmis efficacement à un ensemble de récepteurs. Plusieurs problèmes se posent :
  • la robustesse face aux problèmes de transmission, qu'il s'agisse d'erreurs (inversion de bits) ou de pertes (de paquets);
  • l'efficacité du service fourni, en termes de performances de correction d'erreurs et/ou effacements, et de faible complexité algorithmique;
  • le respect d'éventuelles contraintes temps réelles de certains contenus;
  • et enfin le passage à l'échelle lorsque le nombre de récepteurs augmente significativement.
La problématique est assez large et nous nous "limitons" à deux aspects et composants essentiels que sont :
  • les codes correcteurs de niveau applicatif,ou AL-FEC, pour le canal à effacements, sans lesquels l'efficacité du service serait fortement compromise, et
  • les protocoles de transport qui définissent les règles d'échanges d'informations entre soure(s) et récepteur(s) et garantissent le niveau de fiabilité nécessaire.
Tout au long de ce document, nous détaillons ces deux axes et positionnons nos contributions et leur usage effectif dans le panorama actuel.
This work focuses on the provision of broadcast services where contents of any kinds must be transmitted in an efficient manner to a set of receivers. Several problems arise:
  • the robustness in front of transmission issues, no matter whether it consists of errors (bit inversion) or erasures (of packets);
  • the efficiency of the provided service, in terms of error and/or erasure recovery performance and low algorithmic complexity;
  • the fulfilment of the potential real-time constraints of some contents;
  • and finally the scalability of the service when the number of receivers significantly increases.
The problem space is rather large and we "limit ourself" to two essential components, namely:
  • the application-level correction codes, or AL-FEC, for the erasure channel and without which the efficiency of the service would be largely compromised, and
  • the transport protocols that define the rules for the exchange of information between the source(s) and the destination(s), and provide the required reliability.
Throughout this document, we detail these two axes and position our contributions and their actual usage in the current situation.

January 2013: our RS+LDPC-Staircase proposal at 3GPP received the highest number of votes (1 more than RaptorQ)!
3GGP vote results

Above is a copy of the email announcing the final vote results (NB: "6330" refers to the IETF RFC6330 specifying RaptorQ(tm) codes from Qualcom, Inc. and "Supercharged" refers to the Supercharged codes proposed by Broadcom). With (Expway) and our colleagues from ISAE, we proposed to use Reed-Solomon (RFC5510) + LDPC-Staircase (RFC5170) codes as a replacement to the old Raptor(tm) codes. The competition lasted more than one year. As explained in the above email, the difference is not sufficient for our proposal to be included in the future 3GPP eMBMS standard. However this remains a great achievement and in any case it was proven that our Reed-Solomon + LDPC-Staircase proposal performs better than the old Raptor(tm) codes of the previous 3GPP standards, for all the use-cases considered and representative of the use of AL-FEC codes in 3GPP MBMS technologies.

For more information see: