aka 苏氨酸 / Threonine
I'm a PhD student at the Institute of Information Engineering, Chinese Academy of Sciences, working on cryptography and Web security.
I used to play CTF with Never Stop Exploiting (NeSE) and ROIS, back when the scoreboard was still human.
I also occasionally teamed up with r3kapig, the #1 team in the 2025 CTFtime world ranking.
Selected 2025 results with NeSE
🏆 Champions: N1CTF · 京麒CTF
🥈 Runner-up: 强网杯 · 0CTF · Crypto CTF · OpenHarmonyCTF · …
Then 2026 happened. LLMs took over CTF, and I retired from the AI slop era. 🤖
Security Research Intern · Moonshot AI
Mar 2026–Present · Cybersecurity capabilities of open-source models
🌙 Contributor of Kimi K3: Open Frontier Intelligence
Two-Bit Lifting for Ternary SIS: Polynomial-Time Collision Attacks on LtHash
IACR ePrint 2026/2083
Breaks LtHash16 with ~2⁸¹ queries, against an original claim of 200+ bits of security.
Wagner's k-Tree Revisited: Memory–Time Costs of Preimage Attacks on Incremental Hashes
IACR ToSC 2026 · FSE 2026 · CCF-B · code
Post-retrieval for Wagner's k-tree, with only Θ(k) recovery-time overhead.
Memory Optimizations of Wagner's Algorithm with Applications to Equihash
IACR TCHES 2026 · CHES 2026 · CCF-B · code
Post-retrieval for Wagner's algorithm, reducing peak memory from ~2nN to ~nN.