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Contributions au proxy de re-chiffrement et à la délégation d'authentification

Abstract : Cybersecurity is a major issue for the SmartGrid and energy industries. Manipulating data collected from smart meters can have harmful consequences, especially when the metering systems are connected directly to the production sources. Within the scope of the VertPom project, we have addressed two major issues: the confidentiality of consumption data and authentication systems. To address the confidentiality issues, we used the concept of proxy re-encryption (PRE) which allows the sharing of encrypted data. We have studied existing systems and we are interested in constructions with CCA security in the standard model without pairing. We show the existence of a vulnerability in an existing PRE and we propose a new construction based on the Cramer-Shoup encryption system. We also define the notion of PREaaS (Proxy Re-Encryption as a Service) which allows use in a service-oriented context. Regarding authentication issues, we present a new authentication delegation protocol. Our solution allows users to anonymously authenticate themselves on unsecured networks, asynchronously without direct communication between the different actors, while minimizing the number of interactions
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https://tel.archives-ouvertes.fr/tel-03817258
Contributor : ABES STAR :  Contact
Submitted on : Monday, October 17, 2022 - 9:59:28 AM
Last modification on : Tuesday, October 18, 2022 - 3:27:37 AM

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  • HAL Id : tel-03817258, version 1

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Anass Sbai. Contributions au proxy de re-chiffrement et à la délégation d'authentification. Mathématique discrète [cs.DM]. Université de Picardie Jules Verne, 2021. Français. ⟨NNT : 2021AMIE0032⟩. ⟨tel-03817258⟩

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