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Achievement: Pair ExtraordinaireAchievement: QuickdrawAchievement: Starstruckx2Achievement: Pull Sharkx3Achievement: YOLO

Achievements

Achievement: Pair ExtraordinaireAchievement: QuickdrawAchievement: Starstruckx2Achievement: Pull Sharkx3Achievement: YOLO

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Koukyosyumei/README.md

Hideaki Takahashi 🌍

I’m a second-year Ph.D. student in Computer Science at Columbia University, currently focusing on Zero Knowledge Proofs.

Keywords: Cryptography, Zero Knowledge Proof, Software Testing, Fuzzing, Formal Verification, Rust, Lean4

🚀 Featured Projects

  • zkFuzz: ZK circuit fuzzer (IEEE S&P'26, 60+ confirmed bugs)
  • Runwai: Refinement-typed DSL for certified AIR constraints and lookups implemented in Lean4
  • MyZKP: Tutorial e-book to implement zero-knowledge proofs from scratch using Rust and CUDA.
  • AIJack: Security risk simulator for machine learning (400+ stars on GitHub, 10K+ downloads, referenced in 10+ papers)

🐛 Notable Bugs Found

I’ve discovered and responsibly reported 70+ vulnerabilities in real-world ZK projects. Some confirmed and fixed cases include:

📄 Selected Publications

  • [IEEE S&P '26] 0️⃣: zkFuzz: Foundation and Framework for Effective Fuzzing of Zero-Knowledge Circuits
    • Hideaki Takahashi*, Jihwan Kim, Suman Jana, Junfeng Yang | paper | code
  • [AAMAS '24] 🚗: On the Transit Obfuscation Problem
    • Hideaki Takahashi*, Alex Fukunaga | paper | code
  • [ICLR '24] 🌳: VFLAIR: Benchmark for Vertical Federated Learning
    • Tianyuan Zou, Zixuan Gu, Yu He, Hideaki Takahashi*, Yang Liu, Ya-Qin Zhang | paper | code
  • [CVPR '23] 🎥: Breaching FedMD, Image Recovery via Paired-Logits Inversion Attack
    • Hideaki Takahashi*, Jingjing Liu, and Yang Liu | paper | code

✍️ Pinned Blog Posts

  • Formal Verification of Blockchain Consensus Algorithms in Lean 4 | blog | code
  • Learning x86–64 Machine Language and Assembly by Implementing a Disassembler | blog | code

Pinned Loading

  1. zkFuzz zkFuzz Public

    ZK Circuit Fuzzer (IEEE S&P'26)

    Rust 34 3

  2. AIJack AIJack Public

    Security and Privacy Risk Simulator for Machine Learning (arXiv:2312.17667)

    C++ 412 66

  3. MyZKP MyZKP Public

    Building Zero Knowledge Proof from Scratch in Rust

    Rust 48 2

  4. FLAIR-THU/PairedLogitsInversion FLAIR-THU/PairedLogitsInversion Public

    Implementation of "Breaching FedMD: Image Recovery via Paired-Logits Inversion Attack" (CVPR 2023)

    Python 5

  5. Runwai Runwai Public

    Refinement-typed DSL for certified AIR constraints and lookups

    Lean 5 4

  6. rhoevm rhoevm Public

    symbolic EVM execution engine written in Rust

    Rust 18 2