About

I am a postdoctoral researcher, I will (if all the paperwork works out) start working at King’s College London in the Cryptography team in February 2025.

Previously, I was a PhD student in the AriC team in the LIP laboratory in the ENS de Lyon, in France, working under the supervision of Damien Stehlé, Guillaume Hanrot and Bruno Salvy.

I am currently mainly interested in algorithmic (classical and quantum) on structured lattices (e.g. ideals or module lattices), and their applications to cryptography.

Funding

I am employed by the INRIA Lyon and funded by the Direction Générale de l’Armement (Pôle de Recherche CYBER).

Research Work

Talks

• Ideal-SVP is Hard for Small-Norm Uniform Prime Ideals the 26/09/2023 at CANARI seminar. [slides].
• NTRU and Module uSVP of rank 2 the 13/04/2022 at Journées C2 2022. [slides].

Published work

• Hardness of Structured Lattice Problems for Post-Quantum Cryptography. Joël Felderhoff. PhD Thesis. [Manuscript]. [Mirror]. [Defense Information].
• Ideal-SVP is Hard for Small-Norm Uniform Prime Ideals. Joël Felderhoff, Alice Pellet-Mary, Damien Stehlé and Benjamin Wesolowski. TCC 2023. [Full Version]. [Mirror]
• On Module Unique-SVP and NTRU. Joël Felderhoff, Alice Pellet-Mary and Damien Stehlé. ASIACRYPT 2022. [Full Version]. [Mirror]

Other

• Round Table Politique, cryptographie et nouvelles régulations. Journées Code et Cryptographie 2023.

Unpublished work

• A CHSP Oracle for Arakelov Class Group. Research Internship supervised by Léo Ducas in Crypto group, CWI, Amsterdam. Feb-July 2021. [report (soon)].
• Impossibility results for Module LLL based on Euclidean Division. Research Internship supervised by Damien Stehlé in AriC team, LIP, ENS de Lyon. Sept 2020-Feb 2021. [report].
• Hard Homogenous Spaces and Commutative Supersingular Isogeny based Diffie–Hellman. Research Internship supervised by Benjamin Smith in Grace team, Laboratoire d’Informatique de l’École Polytechnique. Summer 2019. [report].
• Homological product code and weight of random tensors. Research Internship supervised by Péter Vrana in QMATH team, Department of Mathematical Sciences of the University of Copenhagen. Summer 2018. [report].
• Walking along the infrastructures of real quadratic and pure cubic fields. Research Internship supervised by Pierre Jean Spaenlehauer in CARAMBA team, INRIA Nancy - Grand Est. Summer 2017. [report].