Han Xia

Crypto Farmer

About Me

I am currently an assistant professor in the Post-Quantum Cryptography Migration Interdisciplinary Lab (PQC-X) at Xi'an Jiaotong-Liverpool University (XJTLU).

I received my Ph.D. in Cyberspace Security from the Institute of Information Engineering, Chinese Academy of Sciences (IIE, CAS) and the School of Cyber Security, University of Chinese Academy of Sciences (UCAS). My advisor was Prof. Mingsheng Wang.

Research

My research interests lie in cryptography, with a particular focus on fully homomorphic encryption (FHE). I am interested in both the theoretical foundations and practical implementations of FHE, as well as its applications in privacy-preserving protocols and privacy-enhancing technologies.

Selected Publications (full list)

• Efficient and Compact Full-Domain Functional Bootstrapping via Subring Folding
  with Mingsheng Wang
  IACR TCHES 2025. [Paper] [Slides]
• More Efficient Functional Bootstrapping for General Functions in Polynomial Modulus
  with Feng-Hao Liu and Han Wang
  TCC 2024. [Paper] [Slides]

Teaching

• MTH122 Abstract Algebra
  AY2025-2026 Semester 2
• MTH007 Linear Algebra
  AY2025-2026 Semester 1

Talks (non-paper)

• A Brief Introduction to Lattice-Based Cryptography
  Workshop on Quantum Algorithms and Post-Quantum Cryptography
  November 13, 2025 · XJTLU, Suzhou, China

Contact

CB142E, Central Building in North Campus
Xi'an Jiaotong-Liverpool University
No.111 Ren'ai Road, Suzhou Dushu Lake Higher Education Town,
Suzhou Industrial Park, Suzhou, Jiangsu Province, China 215123

Email: contact [at] xiahan [dot] net