Jeff Champion

I am a PhD student in computer science at UT Austin working with David Wu. I'm generally interested in theoretical computer science, especially cryptography.

Previously, I majored in math and computer science at Northeastern University, where I was fortunate to be mentored by abhi shelat and Jonathan Ullman.

Publications & Preprints

Registered ABE and Adaptively-Secure Broadcast Encryption from Succinct LWE
Jeffrey Champion, Yao-Ching Hsieh, David J. Wu
ePrint

Untelegraphable Encryption and its Applications
Jeffrey Champion, Fuyuki Kitagawa, Ryo Nishimaki, Takashi Yamakawa
arXiv

Adaptively-Secure Big-Key Identity-Based Encryption
Jeffrey Champion, Brent Waters, David J. Wu
PKC 2025

Distributed Broadcast Encryption from Lattices
Jeffrey Champion, David J. Wu
TCC 2024 ePrint Slides

Non-Interactive Zero-Knowledge from Non-Interactive Batch Arguments
Jeffrey Champion, David J. Wu
CRYPTO 2023 ePrint Slides

Securely Sampling Biased Coins with Applications to Differential Privacy
Jeffrey Champion, abhi shelat, Jonathan Ullman
CCS 2019 ePrint Slides GitLab

Teaching & Service

Conference Reviewer: CRYPTO 2025, STOC 2025, PKC 2025, TCC 2023, CRYPTO 2022

UT Austin (TA):

2024 CS 395T: Topics In Cryptogrphy
2022 CS 388H: Cryptography
2021 CS 346: Cryptography
2021 CS 331: Algorithms