Research

Publications (Google Scholar)

1. Operation Transparency via zk-Auditors

   Joseph Bonneau, Hossein Hafezi, Christian Knabenhans, Trevor Perrin, Nora Trapp, Greg Zaverucha

   Under preparation

   Contributed talk at Transparency.dev Summit 2026

2. Arguments of Knowledge with Distributed Verification

   Benedikt Bünz, Hossein Hafezi, William Wang

   Under submission

3. PQ-Aegon: Post-Quantum Key Transparency Built to Last

   Hossein Hafezi, Alireza Shirzad, Nirvan Tyagi, Benedikt Bünz, Joseph Bonneau

   Under submission

4. Aegon: Self-Auditable Key Transparency

   Hossein Hafezi, Alireza Shirzad, Benedikt Bünz, Kevin Lewi, Dillon George, Joseph Bonneau

   Under submission

   In collaboration with Meta Research

   PDFCode

5. WillowFold: Secure Aggregation with a Lightweight Committee

   Hossein Hafezi, Kasra Abbaszadeh, Adrià Gascón, Phillipp Schoppmann, Mariana Raykova, Benedikt Bünz

   Under submission

   In collaboration with Google Research

   PDF

6. Single-Server Private Outsourcing of zk-SNARKs

   Kasra Abbaszadeh, Hossein Hafezi, Johnathan Katz, Sarah Meiklejohn

   IEEE Symposium on Security and Privacy (S&P) 2026

   Contributed talk at ZKProof 8 · in collaboration with Google Research

   PDF

7. SoK: Lookup Table Arguments

   Hossein Hafezi, Gaspard Anthoine, Matteo Campanelli, Dario Fiore

   Financial Cryptography and Data Security (FC) 2026

   PDF

8. IronDict: Transparent Dictionaries from Polynomial Commitments

   Hossein Hafezi, Alireza Shirzad, Benedikt Bünz, Joseph Bonneau

   35th USENIX Security Symposium (USENIX Security) 2026

   Contributed talk at Real World Crypto 2026

   PDFCode

9. KZH-Fold: Accountable Voting From Sublinear Accumulation

   Benedikt Bünz, Hossein Hafezi, George Kadianakis, Arantxa Zapico

   ACM Conference on Computer and Communications Security (CCS) 2025

   Contributed talk at ZKProof 8 · in collaboration with Ethereum Foundation

   KZH polynomial commitments are now integrated into arkworks.

   PDFCode

10. Hekaton: Horizontally-Scalable zkSNARKs via Proof Aggregation

    Michael Rosenberg, Tushar Mopuri, Hossein Hafezi, Ian Miers, Pratyush Mishra

    ACM Conference on Computer and Communications Security (CCS) 2024

    PDFCode

Talks

Talks marked with a red ★ are recommended to watch.

Teaching

Teaching Assistant for Cryptography, University of Cambridge (Winter 2026) — course page.

Service

External reviewer for Eurocrypt 2025, ACM CCS 2025, USENIX Security 2026, FC 2026 and ACM CCS 2027.

Volunteer staff at Eurocrypt 2025 (Madrid) and zkSummit 14 (Rome).