Jiajun Xin 辛佳骏

5th year Ph.D. Candidate

Department of Computer Science and Engineering
Hong Kong University of Science and Technology
Hong Kong, China
Email: jxin at cse.ust.hk
GitHub
Google Scholar
DBLP

About Me

I am a fifth-year Ph.D. candidate at HKUST, working under the guidance of Prof. Dimitris Papadopoulos.

Research interests

Applied cryptography: Zero-knowledge proofs, RSA accumulators, signatures and time-lock puzzles
Blockchain: CEX security, zk-DEX and applications of blockchains

Education

Ph.D in Computer Science and Engineering, Aug 2020 - now, Hong Kong University of Science and Technology.
Master in Computer Science and Engineering, Sep 2015 - Dec 2017, University of Nevada, Reno.
Bachelor in Network Engineering, Aug 2011 - Jun 2015, Dalian University Of Technology.

Recent Publications (Full list)

	"Check-Before-you-Solve": Verifiable Time-lock Puzzles IEEE Symposium on Security and Privacy (SP) 2025 Jiajun Xin, Dimitris Papadopoulos full paper code
	Notus: Dynamic Proofs of Liabilities from Zero-knowledge RSA Accumulators USENIX Security Symposium 2024 Jiajun Xin, Arman Haghighi, Xiangan Tian, Dimitris Papadopoulos full paper code artifact evaluation talk by Hongyi Lu
	An Incentive-Compatible Mechanism for Decentralized Storage Network IEEE Transactions on Network Science and Engineering 2023 Iman Vakilinia, Weihong Wang, Jiajun Xin code

Academic Service

Crypto Sub Reviewer 2024
TIFS Reviewer 2024

Work Experience

I previously worked as a software engineer at Huawei and as a blockchain engineer at Xunlei.