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Theses

Protocoles cryptographiques pour le respect de la vie privée

Abstract : With privacy in mind, we explored, in this thesis, the design and improvement of known cryptographic primitives such as signature or authentication. Indeed, we propose an authentication protocol, a Secret Handshake, offering anonymity to the users in case of failure ; it is round-optimal and efficient both in computation and communication. We also present a Blind Signature, e-voting being an almost direct application. It has three properties rarely found combined : round-optimal, constante size and proved secure under classical assumptions in the standard model. Then, an Oblivious Transfer protocol from Code-based cryptography is detailed giving a quantum-resistant and practical algorithm. All the constructions were achieved following a modular approach, combining cryptographic building blocks such as encryption, signature and proof systems, and proven secure under known hardness assumptions.
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https://tel.archives-ouvertes.fr/tel-03624433
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Submitted on : Wednesday, March 30, 2022 - 11:49:08 AM
Last modification on : Thursday, September 8, 2022 - 4:01:25 AM

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2022LIMO0014.pdf
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  • HAL Id : tel-03624433, version 1

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Neals Fournaise. Protocoles cryptographiques pour le respect de la vie privée. Cryptographie et sécurité [cs.CR]. Université de Limoges, 2022. Français. ⟨NNT : 2022LIMO0014⟩. ⟨tel-03624433⟩

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