FHE.org 2025 Sofia Resources
The FHE.org 2025 Sofia Conference has concluded! Here's a recap.
🇧🇬 FHE.org 2025 Sofia Conference
A heartfelt thank you to everyone in the FHE community for coming together and making this year our 4th successful annual conference with a record breaking 56 submissions, 12 accepted talks, 19 accepted posters, 1 invited speaker, 171 registered attendees, and 27 sponsors (including Google and Amazon)!
We’ve made all video resources from the conference available at fhe.org/2025. Remember that anyone can add their resources to the FHE.org github repository!
See a program view of all resources here, or if you prefer to just watch the presentations back to back, here is the FHE.org 2025 Sofia Conference playlist on Youtube. These presentations are also outlined below.
🎤 Fully Homomorphic Encryption for Cyclotomic Prime Moduli
Robin Geelen from COSIC, KU Leuven presents "Fully Homomorphic Encryption for Cyclotomic Prime Moduli".
See the video on Youtube here.
🎤 Reducing Encrypted MM to Plaintext MM
Craig Gentry from Cornami presents "Reducing Encrypted MM to Plaintext MM".
See the video on Youtube here.
🎤 OpenFHE: Open-Source Fully Homomorphic Encryption Library
Yuriy Polyakov from Duality presents "OpenFHE: Open-Source Fully Homomorphic Encryption Library".
See the video on Youtube here.
🎤 Updates on the HEIR Compiler Project
Jeremy Kun from Google presents "Updates on the HEIR Compiler Project".
See the video on Youtube here.
🎤 Precision Tools for FHE Parameter Selection
Beatrice Biasioli and Chiara Marcolla from Technology Innovation Institute present "Precision Tools for FHE Parameter Selection".
See the video on Youtube here.
🎤 FHE Deployment Challenges for Secure Cloud Computing
Flavio Bergamaschi from Intel Labs presents "FHE Deployment Challenges for Secure Cloud Computing".
See the video on Youtube here.
🎤 Privacy-Preserving Collision-Risk Assessment for LEO Satellites
Svenja Lage from German Aerospace Center (DLR) presents "Privacy-Preserving Collision-Risk Assessment for LEO Satellites".
See the video on Youtube here.
🎤 Compact 1-Round Threshold Multiparty Homomorphic Encryption From Public Aggregatable Transcripts
Jean-Philippe Bossuat and Janmajaya Mall from Phantom Zone, and Christian Mouchet from Hasso-Plattner Insituation, University of Potsdam present "Compact 1-Round Threshold Multiparty Homomorphic Encryption From Public Aggregatable Transcripts".
See the video on Youtube here.
🎤 Ciphertext-Simulatable HE from BFV with Randomized Evaluation
Yongsoo Song from Seoul National University presents "Ciphertext-Simulatable HE from BFV with Randomized Evaluation".
See the video on Youtube here.
🎤 Strong IND-CPAD Security for FHE (Essentially) for Free
Marc Joye from Zama presents "Strong IND-CPAD Security for FHE (Essentially) for Free".
See the video on Youtube here.
🎤 Verifiable Computation for Approximate Homomorphic Encryption Schemes
Antonio Guimarães from the IMDEA Software Institute presents "Verifiable Computation for Approximate Homomorphic Encryption Schemes".
See the video on Youtube here.
🎤 Blind zkSNARKs for Private Proof Delegation and Verifiable Computation over Encrypted Data
Jiayi Kang from COSIC, KU Leuven presents "Blind zkSNARKs for Private Proof Delegation and Verifiable Computation over Encrypted Data".
See the video on Youtube here.
🎤 FHE: Inside-Out
Craig Gentry from Cornami presents "FHE: Inside Out" as an invited talk.
See the video on Youtube here.
🪧 Posters from This Year’s Conference
See the full list of resources from each poster presenter on fhe.org/2025/resources.
FINALLY: A Multi-Key FHE Scheme Based on NTRU and LWE by Jeongeun Park, Barry van Leeuwen, and Oliver Zajonc
Adaptive Successive Over-Relaxation Method for a Faster Iterative Approximation of Homomorphic Operations by Jungho Moon, Zhanibek Omarov, Donghoon Yoo, Yongdae An, and Heewon Chung
Designing a General-Purpose 8-bit (T)FHE Processor Abstraction by Daphné Trama, Pierre-Emmanuel Clet, Aymen Boudguiga, Renaud Sirdey, and Nicolas Ye
AES Is Not Enough: Let's Run Other Block Ciphers Over TFHE by Daphné Trama, Aymen Boudguiga, and Renaud Sirdey
Relations Among New CCA Security Notions for Approximate FHE by Sébastien Canard, Caroline Fontaine, Duong Hieu Phan, David Pointcheval, Marc Renard, and Renaud Sirdey
Ecosystems, Business Models and Market Demand for PETs: Insights from Homomorphic Encryption and Synthetic Data by Nicholas Martin and Frederik M. Metzger
Fast Homomorphic Evaluation of LWR-based PRFs and Application to Transciphering by Amit Deo, Marc Joye, Benoit Libert, Benjamin R. Curtis, and Mayeul de Bellabre
On Algebraic Homomorphic Encryption and its Applications to Doubly-Efficient PIR by Hiroki Okada, Rachel Player, Simon Pohmann, and Christian Weinert
Extended External Products of Ciphertexts with Automorphisms and Applications by Olivier Bernard and Marc Joye
RevoLUT : Rust Efficient Versatile Oblivious Look-Up-Tables by Sofiane Azogagh, Aubin Birba, Marc-Olivier Killijian, and Félix Larose-Gervais
Phantom zone library by Janmajaya Mall and Jean-Philippe Bossuat
SoK: Fully-homomorphic encryption in smart contracts by Daniel Aronoff, Adithya Bhat, Panagiotis Chatzigiannis, Mohsen Minaei, Srinivasan Raghuraman, Robert Townsend, and Nicolas Zhang
PowerSoftmax: Towards secure LLM Inference Over FHE by Itamar Zimerman, Allon Adir, Ehud Aharoni, Matan Avitan, Moran Baruch, Nir Drucker, Ramy Masalha, Reut Meiri, and Omri Soceanu
DSP Optimized Fully Pipelined NTT Architecture for FHE Applications by Emre Kocer, Tolun Tosun, Selim Kırbıyık, Ersin Alaybeyoğlu, and Erkay Savas
A Matter of Correctness: Selecting Optimal BFV Parameters and Preventing Key-Recovery Attacks by Beatrice Biasioli and Chiara Marcolla
Fully Homomorphic Encryption from Slot Blind Rotation Technique by Seonhong Min and Yongsoo Song
Practical Sanitization for TFHE by Intak Hwang, Seonhong Min, and Yongsoo Song
TopGear 2.0: Accelerated Authenticated Matrix Triple Generation with Scalable Prime Fields via Optimized HE Packing by Hyunho Cha, Intak Hwang, Seonhong Min, Jinyeong Seo, and Yongsoo Song
Arithmetization for BFV & BGV Circuits Exploiting the Polynomial Ring by Jelle Vos, Mauro Conti, and Zekeriya Erkin
🤝 Sponsors
A sincere thank you to all our sponsors this year for making this conference a success and allowing so many students to attend! If you’d like to become a sponsor for the next conference, reach out at contact@fhe.org.
See the full list of recent and previous sponsors on fhe.org/sponsor.
📅 Upcoming Events
Stay tuned for more news about the upcoming meetups and our first online major event: FHE.org Hardware Day.
FHE.org is an open-source community of researchers and developers interested in Fully Homomorphic Encryption (FHE), if you’d like to contribute, join the community:
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