Publications

TFHE Gets Real: an Efficient and Flexible Homomorphic Floating-Point Arithmetic., L. Bergerat, I. Chillotti, D. Ligier, J.-B. Orfila, S. Tap. TCHES 2025, PDF, artifact

Security Guidelines for Implementing Homomorphic Encryption., J.-P. Bossuat, R. Cammarota, I. Chillotti, B. R. Curtis, W. Dai, H. Gong, E. Hales, D. Kim, B. Kumara, C. Lee, X. Lu, C. Maple, A. Pedrouzo-Ulloa, R. Player, Y. Polyakov, L. A. Ruiz Lopez, Y. Song, D. Yhee. CiC 2024. PDF
Faster Secret Keys for (T)FHE or New Secret Keys for Enhanced Performance in (T)FHE. L. Bergerat, I. Chillotti, D. Ligier, J.-B. Orfila, A. Roux-Langlois, S. Tap. IACR Cryptology ePrint Archive 2023 & ACM CCS 2024. PDF
Security Guidelines for Implementing Homomorphic Encryption. , R. Cammarota, J.H. Cheon, I. Chillotti, B.R. Curtis, W. Dai, H. Gong, E. Hales, D. Kim, B. Kumara, C. Lee, X. Lu, C. Maple, A. Pedrouzo-Ulloa, R. Player, L.A. Ruiz Lopez, Y. Song, D. Yhee, B. Yildiz. IACR Cryptology ePrint Archive 2024 & accepted talk at FHE.org 2024. PDF
TFHE Simplified: A Practical Guide to Integer Arithmetic and Reliability. , I. Chillotti, S. El Kazdadi, D. Ligier, A. Meyre, T. Montaigu, J.-B. Orfila, S. Tap. Accepted talk at FHE.org 2024.
Scooby: Improved Multi-Party Homomorphic Secret Sharing Based on FHE (long version). I. Chillotti, E. Orsini, P. Scholl, B. Van Leeuwen. I & C 2024.

Parameter Optimization & Larger Precision for (T)FHE. L. Bergerat, A. Boudi, Q. Bourgerie, I. Chillotti, D. Ligier, J.-B. Orfila, S. Tap. Journal of Cryptology 2023 & accepted talk at FHE.org 2023. PDF

Scooby: Improved Multi-Party Homomorphic Secret Sharing Based on FHE. I. Chillotti, E. Orsini, P. Scholl, N. Smart, B. Van Leeuwen. SCN 2022. PDF

Improved Programmable Bootstrapping with Larger Precision and Efficient Arithmetic Circuits for TFHE. I. Chillotti, D. Ligier, J.-B. Orfila, S. Tap. Asiacrypt 2021. PDF
Ultra-Fast Homomorphic Encryption Models enable Secure Outsourcing of Genotype Imputation. M. Kim, A. O. Harmanci, J.-P. Bossuat, S. Carpov, J. H. Cheon, I. Chillotti, W. Cho, D. Froelicher, N. Gama, M. Georgieva, S. Hong, J.-P. Hubaux, D. Kim, K. Lauter, Y. Ma, L. Ohno-Machado, H. J Sofia, Y. Son, Y. Song, J. R Troncoso-Pastoriza, X. Jiang. Cell Systems 2021. PDF
Programmable Bootstrapping Enables Efficient Homomorphic Inference of Deep Neural Networks. I. Chillotti, M. Joye, P. Paillier. CSCML 2021. PDF

CONCRETE: Concrete Operates oN Ciphertexts Rapidly by Extending TfhE. I. Chillotti, M. Joye, D. Ligier, J.-B. Orfila, S. Tap. Demo paper at WAHC 2020. PDF
New Challenges for Fully Homomorphic Encryption. I. Chillotti, M. Joye, P. Paillier. Privacy-preserving Machine Learning (PPML-PriML 2020) NeurIPS 2020 workshop. PDF
SANNS: Scaling Up Secure Approximate k-Nearest Neighbors Search. H. Chen, I. Chillotti, Y. Dong, O. Poburinnaya, I. Razenshteyn, M. S. Riazi. USENIX Security Symposium 2020. PDF
TFHE: Fast Fully Homomorphic Encryption over the Torus. I. Chillotti, N. Gama, M. Georgieva, M. Izabachène. Journal of Cryptology 2020. PDF

Onion Ring ORAM: Efficient Constant Bandwidth Oblivious RAM from (Leveled) TFHE. H. Chen, I. Chillotti, L. Ren. CCS 2019. PDF
Multi-Key Homomophic Encryption from TFHE. H. Chen, I. Chillotti, Y. Song. ASIACRYPT 2019. PDF
Improved Bootstrapping for Approximate Homomorphic Encryption. H. Chen, I. Chillotti, Y. Song. EUROCRYPT 2019. PDF

Scaling Up Secure Nearest Neighbor Search. H. Chen, I. Chillotti, O. Poburinnaya, I. Razenshteyn, M. S. Riazi. Privacy Preserving Machine Learning (PPML’18), NeurIPS 2018 Workshop.
Towards efficient and secure Fully Homomorphic Encryption and cloud computing. I. Chillotti. PhD manuscript (Université de Versailles Saint-Quentin-en-Yvelines, Paris-Saclay). PDF
High-Precision Privacy-Preserving Real-Valued Function Evaluation. C. Boura, I. Chillotti, N. Gama, D. Jetchev, S. Peceny, A. Petric. Financial Cryptography and Data Security 2018. PDF

Faster Packed Homomorphic Operations and Efficient Circuit Bootstrapping for TFHE. I. Chillotti, N. Gama, M. Georgieva, M. Izabachène. ASIACRYPT 2017. PDF

Attacking FHE-based applications by software fault injections. I. Chillotti, N. Gama, L. Goubin. IACR Cryptology ePrint Archive 2016. PDF.
Faster fully homomorphic encryption: Bootstrapping in less than 0.1 seconds. I. Chillotti, N. Gama, M. Georgieva, M. Izabachène. ASIACRYPT 2016 (Best Paper). PDF.
A homomorphic LWE based e-voting scheme. I. Chillotti, N. Gama, M. Georgieva, M. Izabachène. PQCrypto 2016. PDF.