Zhenfei Zhang
Chief Cryptographer at Polyhedra Network
Greater Boston United States
Summary
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Rockstar🎓
Top SchoolZhenfei Zhang is a chief cryptographer and blockchain engineer with 11 years of experience building practical cryptography for decentralized systems, now leading cryptography at Polyhedra Network in Greater Boston. He has held senior research and engineering roles across the Ethereum Foundation, Scroll, Espresso Systems and Algorand, and co-founded Manta Network, blending protocol design, ZKP engineering and product-driven security. Zhenfei’s academic background includes a PhD focused on fully homomorphic encryption, underpinning his work on advanced primitives and scalable zero-knowledge systems. An active rustacean contributor, he has implemented and extended PLONK-style ZKP components in the popular EspressoSystems/jellyfish repository, including proof-of-knowledge-of-exponent examples and SRS-size checks. Colleagues describe him as equally comfortable proving the math on a whiteboard and shipping robust Rust APIs for production blockchains.
11 years of coding experience
9 years of employment as a software developer
Bachelor of Computer Science, Bachelor of Computer Science at Beihang UniversityDoctor of Philosophy (Ph.D.) Fully Homomorphic Encryptions, Doctor of Philosophy (Ph.D.) Fully Homomorphic Encryptions at University of Wollongong
Stackoverflow
126reputation
286reached
1answer
0questions
Github Skills (9)
rust10
cryptography10
api-design9
algebra9
struct9
structures9
bouncy-castle6
encryption6
java6
Programming languages (11)
Github contributions (5)
EspressoSystems/jellyfish
Jan 2022 - Jun 2022
A Rust Implementation of the PLONK ZKP System and Extensions
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 55 reviews, 52 commits in 5 months
Contributions summary:Zhenfei contributed to the `jellyfish` repository, which focuses on a Rust implementation of the PLONK ZKP System. Their work involved implementing and refining features related to zero-knowledge proofs, specifically demonstrating knowledge of exponents. The user added example code for proof of knowledge of exponent. Additionally, the user worked on improving the API and adding checks related to SRS size.
cryptographyzkprustcryptanalysisblockchain
Manta-Network/pallet-manta-pay
Feb 2021 - Jun 2021
A substrate pallet that enables Manta's decentialized anynonymous payment (MantaPay) protocol.
Contributions:3 releases, 45 reviews, 53 commits in 3 months
substraterustmantablockchainsubstrate-pallet
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