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Can Homomorphic Cryptography ensure Privacy?

Antoine Guellier 1, *
* Corresponding author
1 CIDRE - Confidentialité, Intégrité, Disponibilité et Répartition
IRISA-D1 - SYSTÈMES LARGE ÉCHELLE, Inria Rennes – Bretagne Atlantique , CentraleSupélec
Abstract : The advent of information technology, the dramatic increase of computational and storage capacities along with the development of worldwide communications promise very personalized, well designed and convenient services. However, although privacy is an important right in our societies, these services often neglect and abuse their consumers' privacy, by collecting sensible data notably. This work focuses on the protection of privacy in information systems. For this, it is known that traditional cryptography (e.g. encryption or signature schemes) is necessary, for instance to ensure confidentiality, but it is not sufficient. To enable usability and privacy at the same time, stronger tools are required. Homomorphic cryptography is a possible and promising candidate for this purpose. This technology allows manipulating encrypted data and performing logical operations on it without actually accessing the data in the clear. In particular, homomorphic cryptography is envisioned as the perfect technology for secure computation (or storage) delegation in the cloud. This work investigates how homomorphic cryptography can enable privacy, by first giving a deep insight of the field of privacy in computer science (systems of interest, tools, main goals, ...) and then presenting homomorphic cryptography and more specifically (fully) homomorphic encryption, aggregating the work done in this branch of cryptography in the last 30 years. At last, this work gives clues to answer the main question can homomorphic cryptography ensure privacy?, and interesting leads currently investigated or yet to be considered.
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https://hal.inria.fr/hal-01052509
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Submitted on : Tuesday, October 21, 2014 - 8:22:43 AM
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  • HAL Id : hal-01052509, version 2

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Antoine Guellier. Can Homomorphic Cryptography ensure Privacy?. [Research Report] RR-8568, IRISA; Supélec Rennes, équipe Cidre; Inria. 2014, pp.109. ⟨hal-01052509v2⟩

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