Cathie Yun
Cryptography Engineer at Apple
San Francisco, California, United States
Summary
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Rockstar🎓
Top SchoolCathie Yun is a cryptography engineer in San Francisco with a decade of experience turning advanced research into production-ready, privacy-preserving systems. She has built and reviewed protocols across zero-knowledge proofs (notably Bulletproofs), PIR, VOPRF-based anonymous tokens, and exposure-notification privacy designs, and contributes to well-known open-source crypto projects including a Rust Bulletproofs implementation. Her work spans top-tier product and research teams at Apple and Google as well as privacy-focused startups like Chain and Interstellar, where her implementations have secured real-world value (used in MobileCoin). Cathie combines low-level library development (corecrypto, CryptoKit, Tink) with protocol design and performance engineering, including FHE transpilation and MPC optimizations. She holds an MEng from MIT and habitually bridges theoretical advances and deployable code, often surfacing subtle attack-detection tests and dishonest-party checks in her implementations.
10 years of coding experience
7 years of employment as a software developer
Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Massachusetts Institute of Technology
English, Chinese
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (5)
algorithms10
rust10
cryptography10
linear-algebra9
distributed-systems7
Programming languages (5)
Github contributions (5)
dalek-cryptography/bulletproofs
Feb 2018 - Jan 2023
A pure-Rust implementation of Bulletproofs using Ristretto.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:275 commits, 64 PRs, 311 pushes in 5 years
Contributions summary:Cathie's contributions focused on implementing the core logic for an aggregated range proof, including implementing the `Dealer` and `Party` structs, and defining the messages used in the proof protocol. They also implemented code for the `SinglePartyAggregator` struct and added tests to detect a dishonest party during the aggregation process. The changes involved modifications to `dealer.rs`, `mod.rs` and `messages.rs`, demonstrating a focus on the core cryptographic proof implementation.
cryptographybulletproofsristrettorustsat-solver
interstellar/spacesuit
Sep 2018 - Apr 2019
Efficient multi-asset confidential transactions
Contributions:168 commits, 9 PRs, 40 pushes in 7 months
confidentialtransactionsasset
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