Zama research

Read the latest publications by the people at Zama.

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POLKA: Towards leakage-resistant post-quantum CCA-secure public-key encryption
May 2023 — PKC 2023
Clément Hoffmann, Benoît Libert, Charles Momin, Thomas Peters, and François-Xavier Standaert

Differential fault ananlysis
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March 2023 — CT-RSA 2023
Marc Joye and Michael Tunstall

Recent advances in homomorphic compilation
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March 2023 — FHE.org 2023
Pascal Paillier

On NTRU -ν-um modulo Xᴺ-1
March 2023 — FHE.org 2023
Marc Joye

Parameter optimization & larger precision for (T)FHE
March 2023 — FHE.org 2023
Loris Bergerat, Anas Boudi, Quentin Bourgerie, Ilaria Chillotti, Damien Ligier, Jean-Baptiste Orfila, and Samuel Tap

Private smart contracts using homomorphic encryption
March 2023 — FHE.org 2023
Morten Dahl, Levent Demir, and Louis Tremblay Thibault

Fully homomorphic encryption for user privacy and model intellectual property protection
March 2023 — FHE.org 2023
Roman Bredehoft, Benoît Chevallier-Mames, Jordan Fréry, Celia Kherfallah, Luis Montero, and Andrei Stoian

Improving convergence and practicality of slide-type reductions
December 2022 — Information and Computation, 2023
Jianwei Li and Michael Walter

FINAL: Faster FHE instantiated with NTRU and LWE
December 2022 — ASIACRYPT 2022
Charlotte Bonte, Ilia Iliashenko, Jeongeun Park, Hilder V. L. Pereira, and Nigel P. Smart

Liberating TFHE: Programmable bootstrapping with general quotient polynomials
November 2022 — WAHC 2022
Marc Joye and Michael Walter

Liberating TFHE: Programmable bootstrapping with general quotient polynomials
November 2022 — WAHC 2022
Marc Joye and Michael Walter

Guide to Fully Homomorphic Encryption over the [Discretized] Torus
September 2022 — CHES
Marc Joye

Scooby: Improved multi-party homomorphic secret sharing based on FHE
September 2022 — SCN
Ilaria Chillotti, Emmanuela Orsini, Peter Scholl, Nigel Smart, and Barry Van Leeuwen

Fast computation of the octic residue symbol
August 2022 — NutMiC 2022
Marc Joye

Blind rotation in fully homomorphic encryption with extended keys
June 2022 — CSCML
Marc Joye and Pascal Paillier

CoCoA: Concurrent continuous group key agreement
May 2022 — Eurocrypt
Joël Alwen, Benedikt Auerbach, Miguel Cueto Noval, Karen Klein, Guillermo Pascual-Perez, Krzysztof Pietrzak, and Michael Walter

Hybrid attacks on LWE and the lattice estimator
May 2022 — FHE.org
Martin Albrecht, Benjamin R. Curtis, and Michael Walter

Fast, easy, and accessible FHE with Concrete and specialized accelerators
May 2022 — FHE.org
Florent Michel, Thomas De Cnudde, and Agnès Leroy

Concrete ML: A data-scientist-friendly toolkit for machine learning over encrypted data
May 2022 — FHE.org
Benoît Chevallier-Mames, Jordan Fréry, Arthur Meyre, and Andrei Stoian

Performance of hierarchical transforms in homomorphic encryption: A case study on logistic regression inference
May 2022 — FHE.org
Pedro G. M. R. Alves, Jheyne N. Ortiz, and Diego F. Aranha

A pairing-free signature scheme from correlation intractable hash function and strong Diffie-Hellman assumption
January 2022 — CT-RSA
Benoît Chevallier-Mames

Balanced non-adjacent forms
December 2021 — ASIACRYPT
Marc Joye

Improved programmable bootstrapping with larger precision and efficient arithmetic circuits for TFHE
December 2021 — ASIACRYPT
Ilaria Chillotti, Damien Ligier, Jean-Baptiste Orfila, and Samuel Tap

Grafting key trees: Efficient key management for overlapping groups
November 2021 — ASIACRYPT
Joël Alwen, Benedikt Auerbach, Mirza Ahad Baig, Miguel Cueto Noval, Karen Klein, Guillermo Pascual-Perez, Krzysztof Pietrzak, and Michael Walter

The cost of adaptivity in security games on graphs
November 2021 — TCC
Chethan Kamath, Karen Klein, Krzysztof Pietrzak, and Michael Walter

Ultrafast homomorphic encryption models enable secure outsourcing of genotype imputation
December 2021 — CELL SYSTEMS
Miran Kim, Arif Harmanci, Jean-Philippe Bossuat, Sergiu Carpov, Jung Hee Cheon, Ilaria Chillotti, Wonhee Cho, David Froelicher, Nicolas Gama, Mariya Georgieva, Seungwan Hong, Jean-Pierre Hubaux, Duhyeong Kim, Kristin Lauter, Yiping Ma, Lucila Ohno-Machado, Heidi Sofia, Yongha Son, Yongsoo Song, Juan Troncoso-Pastoriza, and Xiaoqian Jian

Programmable bootstrapping enables efficient homomorphic inference of deep neural networks
July 2021 — CSCML
Ilaria Chillotti, Marc Joye, and Pascal Paillier

The eleventh power residue symbol
November 2020 — J. MATH. CRYPTOL
Marc Joye, Oleksandra Lapiha, Ky Nguyen, and David Naccache

CONCRETE: Concrete Operates oN Ciphertexts Rapidly by Extending TfhE
December 2020 — WAHC
Ilaria Chillotti, Marc Joye, Damien Ligier, Jean-Baptiste Orfila, and Samuel Tap

New challenges for fully homomorphic encryption
December 2020 — PPML
Ilaria Chillotti, Marc Joye, and Pascal Paillier

SANNS: Scaling up secure approximate k-nearest neighbors search
August 2020 — USENIX
Hao Chen, Ilaria Chillotti, Yihe Dong, Oxana Poburinnaya, Ilya Razenshteyn, and M. Sadegh Riazi