Qianyu Yu

Qianyu Yu于千喻

About

I'm a Ph.D. candidate in Fintech at the Hong Kong University of Science and Technology (Guangzhou), advised by Xuechao Wang. Since April 2026 I have been a visiting scholar at the Siebel School of Computing and Data Science, University of Illinois Urbana-Champaign, hosted by Ling Ren. My research interests are blockchain, consensus protocols and distributed computing. I received a Distinguished Paper Award at ACM CCS 2025.

Before starting my Ph.D., I spent five years in industry, at Ant Group in Shanghai and then at Alibaba in Guangzhou. I hold an M.S. in Circuits and Systems from Fudan University and a B.S. in Electronic Engineering and Information Science from University of Science and Technology of China.

If you're interested in collaborating, feel free to write to me at qyu100@connect.hkust-gz.edu.cn.

I am on the job market this year, looking for faculty and postdoctoral positions starting in 2027.

Publications

Authors marked * are listed in alphabetical order.

Simple-IT: Practical Low-Latency Signature-Free BFT Consensus

Qianyu Yu, Juan Villacis, Giuliano Losa, Zhuolun Xiang, Xuechao Wang
IEEE Symposium on Security and Privacy (S&P) 2027, to appear

Angelfish: Leader, DAG, or Anywhere in Between

Qianyu Yu, Giuliano Losa, Nibesh Shrestha, Xuechao Wang
ACM Conference on Computer and Communications Security (CCS) 2026

Optimistic, Signature-Free Reliable Broadcast and Its Applications

Nibesh Shrestha*, Qianyu Yu*, Aniket Kate, Giuliano Losa, Kartik Nayak, Xuechao Wang
ACM Conference on Computer and Communications Security (CCS) 2025

Distinguished Paper Award

TetraBFT: Reducing Latency of Unauthenticated, Responsive BFT Consensus

Qianyu Yu, Giuliano Losa, Xuechao Wang
ACM Symposium on Principles of Distributed Computing (PODC) 2024

Preprints

Simple and Fast Signature-Free Blockchain Consensus

Giuliano Losa, Xuechao Wang, Zhuolun Xiang, Qianyu Yu
arXiv:2609.32985

Hydrozoan: Latency-Adaptive DAG Consensus under Mixed Byzantine and Crash Faults

Qianyu Yu, Lefteris Kokoris-Kogias, Alberto Sonnino
arXiv:2609.25918

Merged Bitcoin: Proof of Work Blockchains with Multiple Hash Types

Christopher Blake, Chen Feng, Xuechao Wang, Qianyu Yu
arXiv:2601.09090

Rigorous and Generalized Proof of Security of Bitcoin Protocol with Bounded Network Delay

Christopher Blake, Chen Feng, Xuechao Wang, Qianyu Yu
arXiv:2601.09082

Talks

Angelfish: Leader, DAG, or Anywhere in Between

Columbia Summer School on Blockchain Consensus 2026, New York, USA

TetraBFT: Reducing Latency of Unauthenticated, Responsive BFT Consensus

ACM Symposium on Principles of Distributed Computing (PODC) 2024, Nantes, France

Graph Representation Learning for Merchant Incentive Optimization in Mobile Payment Marketing

ACM Conference on Information and Knowledge Management (CIKM) 2019, Beijing, China

Service

Journal reviewer for IEEE Transactions on Dependable and Secure Computing.

Conference reviewer for USENIX Security (2027, 2026, 2025), ACM CCS (2026, 2025, 2024), Financial Cryptography (2027, 2026, 2025), ACNS (2027), AsiaCCS (2026), DISC (2026), and Eurocrypt (2025).

Teaching

Introduction to Multivariable Calculus (UFUG2101)

Teaching assistant, Fall 2025, HKUST (Guangzhou)

Decentralized Finance (FTEC5320)

Teaching assistant, Spring 2025, HKUST (Guangzhou)