Name: Julien Bringer

Institution: Sagem Sécurité



Julien Bringer received the Agrégation de Mathématiques degree in 2000, is a former student of the École Normale Supérieure de Cachan, Cachan, France, and received the Ph.D. degree in 2007 from the Université de Toulon, Toulon, France, on the study of Boolean functions and codes useful in cryptography.


Since 2004, he has been a research and development staff member at Sagem Sécurité, Osny, France, within the cryptographic and security research team. Since 2006, he is manager of research projects in the field of biometrics and cryptography.  Particularly, he was contributor of the French ANR RNRT project BACH (Biometric Authentication with Cryptographic Handling, 2006-2009) and he is the technical manager inside Sagem Sécurité of the European FP7 integrated project TURBINE (TrUsted Revocable Biometric IdeNtitiEs, 2008-2011). His research interests include cryptography, biometrics, security, RFID and privacy. He has several patents pending and published more than 20 scientific papers in peer-reviewed journals and international conferences.




Title: Biometrics and Cryptography: New Techniques for Protection of Identities


Biometric recognition becomes more and more deployed in various applications (police, military, government or civil ones). This factor of authentication – “who I am” – has some advantages compared to the two factors “what I know” and “what I have”. For instance, it enables an individual to be authenticated without the need to remember a long password. And one of its main strength is the possibility to identify an individual among a set of many individuals, without any supplementary information than a biometric data.


However, biometrics raises privacy issues, particularly on confidentiality of the data and the privacy of the associated individuals, e.g. to withstand the analysis of the behavior of an individual through different applications. Moreover, as the comparison of biometric data is not limited to a simple equality test due to the inherent noise of a biometric capture, classical cryptographic solutions are not sufficient.


Privacy enhancing technologies dedicated to biometrics are thus requested and it is a great challenge to find such technologies. It is a preamble to a wide acceptance of biometrics for identity management during day to day life of individuals. A second motivation is the ability to comply with the expectations of the international or national Data Protection Authorities.


The oral presentation will give an overview of the research works conduced to advance toward innovative solutions enabling, for instance, confidentiality of the biometric data and privacy of the users. These works encompass techniques for binarization of biometric data, security and privacy models, protocols for authentication or identification with encrypted data, and protocols for privacy protection of users.


Julien Bringer, Sagem Sécurité,