Publications (Google Scholar)

  1. Hekaton: Horizontally-Scalable zkSNARKs via Proof Aggregation (PDF) (Code)
    Michael Rosenberg, Tushar Mopuri, Hossein Hafezi, Ian Miers, Pratyush Mishra
    Proceedings of the 2024 ACM SIGSAC Conference on Computer and Communications Security
  2. KZH-Fold: Accountable Voting From Sublinear Accumulation (PDF) (Code)
    Benedikt Bünz, Hossein Hafezi, George Kadianakis, Arantxa Zapico
    Proceedings of the 2025 ACM SIGSAC Conference on Computer and Communications Security
    Accepted Contributed Talk in ZKProof 8
    In Collaboration with Ethereum Foundation
  3. IronDict: Transparent Dictionaries from Polynomial Commitments (PDF) (Code)
    Hossein Hafezi, Alireza Shirzad, Benedikt Bünz, Joseph Bonneau
     Proceeding of 35th USENIX Security Symposium
    Accepted Contributed Talk in Real World Crypto 2026 (RWC2026)
  4. SoK: Lookup Table Arguments (PDF)
    Hossein Hafezi, Gaspard Anthoine, Matteo Campanelli, Dario Fiore,
     Proceeding of Financial Cryptography and Data Security 2026
  5. Single-Server Private Outsourcing of zk-SNARKs (PDF)
    Kasra Abbaszadeh, Hossein Hafezi, Johnathan Katz, Sarah Meiklejohn
     Proceeding of IEEE Symposium on Security and Privacy 2026
    Accepted Contributed Talk in ZKProof 8
    In Collaboration with Google Research (USA)
  6. WillowFold: Secure Aggregation with a Lightweight Committee (PDF)
    Hossein Hafezi, Kasra Abbaszadeh, Adrià Gascón, Phillipp Schoppmann, Mariana Raykova, Benedikt Bünz
    Under submission
    In Collaboration with Google Research (USA)
  7. Aegon: Scalable and Self-Auditable Key Transparency
    Hossein Hafezi, Alireza Shirzad, Benedikt Bünz, Kevin Lewi, Dillon George, Joseph Bonneau
     Under submission
    In Collaboration with Meta Research (USA)
  8. Fair Signature Exchange (PDF) (Code)
    Hossein Hafezi, Aditi Partap, Sourav Das, Joseph Bonneau,
     Cryptology Eprint

Talks

KZH-Fold: Accountable Voting from Sublinear Accumulation (Slides)

IronDict: Transparent Dictionaries from Polynomial Commitments (Slides)

Self-Auditable Key Transparency (Slides)

Single-Server Private Outsourcing of zk-SNARKs (Slides)

Service

External reviewer in Eurocrypt 2025, ACM CCS 2025, USENIX Security 2026, FC 2026, ACM CCS 2027
Volunteer staff in Eurocrypt 2025 (Madrid) and zkSummit 14 (Rome)

Teaching

Teaching Assistant for Cryptography (Winter 2026, University of Cambridge, Course Page)