CRYPTO : Nagarjun Dwarakanath (UVSQ et ATOS) : Some improvements to the FermatFHE cryptosystem

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CRYPTO : Nagarjun Dwarakanath (UVSQ et ATOS) : Some improvements to the FermatFHE cryptosystem

19 novembre 2020 / 11:00 - 12:00

In 2019, Antoine Joux proposed a FHE based on Fermat numbers, with an aim to express all cryptographic functions in simple operations on the ciphertext components and their binary decompositions. We use recent results on sub-Gaussian variables to find better bounds on the errors in the cryptosystem leading to smaller parameters. We also adapt the concept of k-bit encryption and functional bootstrapping proposed by Gao to the FHE. With this variant, we can extract the XOR and AND gates (and all other basic gates) in a single bit extraction. For larger values of k, we also discuss possibilities of evaluating commonly used activation functions in neural networks using this mechanism.

Le séminaire aura lieu en ligne via la plateforme Zoom :

https://uvsq-fr.zoom.us/j/96588261994?pwd=YVZLYm04R2dUOFQvS25lb2QzVm9Ydz09

Veuillez contacter les organisateurs pour avoir le code de la réunion.

CRYPTO : Nagarjun Dwarakanath (UVSQ et ATOS) : Some improvements to the FermatFHE cryptosystem

Détails

Date :
19 novembre 2020
Heure :
11:00 - 12:00
Catégorie d’évènement:

Organisateurs

Christina Boura
Yann Rotella