Elkana Tovey

PhD Student · Department of Computer Science
Hebrew University of Jerusalem
Advised by Yossi Gilad

My research focuses on applied cryptography and secure, scalable systems, including secure computation, differential privacy, and privacy-preserving machine learning. My work spans metadata-private messaging, anonymous payments, and selective disclosure of confidential information. I combine protocol design with practical implementations, using tools such as zero-knowledge proofs, homomorphic encryption, and oblivious computation.

News

  • Joined Microsoft Research Cambridge as a Research Intern.
  • Paper accepted to ACM CCS 2026: AuditPay: Anonymous Payments with Controlled Oversight.
  • Awarded the CHE Scholarship for Outstanding Doctoral Students by the Israeli Council for Higher Education.
  • Presented Distributed PIR at ACM CCS 2024 in Salt Lake City.

Publications

Distributed PIR: Scaling Private Messaging via the Users' Machines

Elkana Tovey, Jonathan Weiss, Yossi Gilad

ACM CCS 2024

Education

Ph.D. in Computer Science

Hebrew University of Jerusalem

Provably scalable secure and private systems using ZKPs, FHE, and oblivious computation.

2023 – present

M.Sc. in Computer Science

Hebrew University of Jerusalem

Metadata-private communication systems via secure distributed computation, homomorphic encryption, and PIR.

2021 – 2023

B.Sc. in Computer Science and Mathematics

Hebrew University of Jerusalem

2017 – 2021

Experience

Research Scientist Intern

Microsoft Research — Cambridge, UK

Designed and built Evidence via Limited Disclosure, an end-to-end prototype that registers vulnerability reports with a transparency service and enables selectively disclosed, independently verifiable evidence to support duplicate-report determinations.

Jun – Sep 2026

Research Scientist Intern

IBM Research — Israel

Engineered a Go-based reverse-proxy library enabling secure TCP/mTLS communication through firewalls for encrypted inter-cloud connectivity without application-level changes.

Jun – Oct 2023

Teaching Assistant

Hebrew University of Jerusalem

Current: Operating Systems, Introduction to Cryptography.
Previous: Introduction to Networks, Machine Learning, Data Privacy.

2019 – present

Awards

  • CHE Scholarship for Outstanding Doctoral Students (2025–2026)
    National fellowship, Israeli Council for Higher Education.
  • Ullman Scholarship for Young Researchers (2021–2023)
    For work on secure communication systems.