About Me

I am a postdoctoral researcher at Singapore Management University, hosted by Prof. Haiyang Xue. I received my Ph.D. in Computer Science from Shanghai Jiao Tong University, advised by Prof. Dawu Gu and Prof. Zhedong Wang. Before that, I received my B.Sc. in Software Engineering from Shandong University.

My research focuses on lattice-based cryptography. During my Ph.D., I focused on secure and efficient identity-based encryption in the standard model. My broader interests include public-key encryption, attribute-based encryption, digital signatures, group and ring signatures, blind and threshold signatures, and post-quantum key exchange protocols.

I have been a research intern at CISPA Helmholtz Center for Information Security, hosted by Doreen Riepel, and at the ECO group of LIRMM/CNRS, hosted by Katharina Boudgoust.

Publications

ASIACRYPT 2025

Revisiting Adaptively Secure IBE from Lattices with Smaller Modulus: A Conceptually Simple Framework with Low Overhead

Weidan Ji, Zhedong Wang, Lin Lyu, Dawu Gu.

PKC 2025

Adaptively Secure IBE from Lattices with Asymptotically Better Efficiency

Weidan Ji, Zhedong Wang, Lin Lyu, Dawu Gu.

SAC 2024

Identity-Based Encryption from Lattices with More Compactness in the Standard Model

Weidan Ji, Zhedong Wang, Haoxiang Jin, Qi Wang, Geng Wang, Dawu Gu.