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Conception de mécanismes d’accréditations anonymes et d’anonymisation de données

Solenn Brunet 1 
1 CIDRE - Confidentialité, Intégrité, Disponibilité et Répartition
CentraleSupélec, Inria Rennes – Bretagne Atlantique , IRISA-D1 - SYSTÈMES LARGE ÉCHELLE
Abstract : The emergence of personal mobile devices, with communication and positioning features, is leading to new use cases and personalized services. However, they imply a significant collection of personal data and therefore require appropriate security solutions. Indeed, users are not always aware of the personal and sensitive information that can be inferred from their use. The main objective of this thesis is to show how cryptographic mechanisms and data anonymization techniques can reconcile privacy, security requirements and utility of the service provided. In the first part, we study keyed-verification anonymous credentials which guarantee the anonymity of users with respect to a given service provider: a user proves that she is granted access to its services without revealing any additional information. We introduce new such primitives that offer different properties and are of independent interest. We use these constructions to design three privacy-preserving systems: a keyed-verification anonymous credentials system, a coercion-resistant electronic voting scheme and an electronic payment system. Each of these solutions is practical and proven secure. Indeed, for two of these contributions, implementations on SIM cards have been carried out. Nevertheless, some kinds of services still require using or storing personal data for compliance with a legal obligation or for the provision of the service. In the second part, we study how to preserve users’ privacy in such services. To this end, we propose an anonymization process for mobility traces based on differential privacy. It allows us to provide anonymous databases by limiting the added noise. Such databases can then be exploited for scientific, economic or societal purposes, for instance.
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Contributor : Christophe Bidan Connect in order to contact the contributor
Submitted on : Monday, December 4, 2017 - 6:00:47 PM
Last modification on : Friday, August 5, 2022 - 2:54:52 PM


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  • HAL Id : tel-01655322, version 1


Solenn Brunet. Conception de mécanismes d’accréditations anonymes et d’anonymisation de données. Cryptographie et sécurité [cs.CR]. Université de Rennes 1 [UR1], 2017. Français. ⟨NNT : ⟩. ⟨tel-01655322⟩



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