Zhou Zhang

Zhou Zhang

Ph.D. student in applied cryptography

About me

I am a fourth-year Ph.D. student at the School of Cyber Science and Technology, Beihang University, advised by Zhenyu Guan and Song Bian.

My research focuses on building practical technologies for computing over private data, including fully homomorphic encryption, encrypted databases, and private information retrieval. I am particularly interested in the algorithms, compilers, and systems that make these cryptographic tools efficient and useful in real-world applications.

Publications

  1. SPIRIT: Batch Hintless Single-Server PIR via Stateful Ciphertext Conversion Zhou Zhang, Ran Mao, Zian Zhao, Haowen Pan, Yunhao Fu, Yizhong Liu, Dawei Li, Yi Chen, Bo Zhang, Changrui Ren, Jin Dong, Zhenyu Guan, Song BianUSENIX Security, 2026 Paper Code
  2. SALUS: Large-Scale Homomorphic Circuit Synthesis via Logic-Aware LUT Optimization Ran Mao, Zhou Zhang, Zian Zhao, Zhenyu Guan, Peng Yin, Song BianIEEE Transactions on Information Forensics and Security, 2026 Paper Code
  3. Enabling Energy-Efficient Homomorphic Encryption Evaluation via eDRAM-Based In-Situ Computing in an Edge Processor Luchang Lei, Yongqing Zhu, Xinhang Zou, Zhou Zhang, Zian Zhao, Yifan He, Gangfeng Du, Zhenyu Guan, Huazhong Yang, Yongpan Liu, Song Bian, Hongyang JiaIEEE Journal of Solid State Circuits, 2025
  4. Engorgio: An Arbitrary-Precision Unbounded-Size Hybrid Encrypted Database via Quantized Fully Homomorphic Encryption Song Bian, Haowen Pan, Jiaqi Hu, Zhou Zhang, Yunhao Fu, Jiafeng Hua, Yi Chen, Bo Zhang, Yier Jin, Jin Dong, Zhenyu GuanUSENIX Security, 2025 Paper Code
  5. CHLOE: Loop Transformation over Fully Homomorphic Encryption via Multi-Level Vectorization and Control-Path Reduction Song Bian, Zian Zhao, Ruiyu Shen, Zhou Zhang, Ran Mao, Dawei Li, Yizhong Liu, Masaki Waga, Kohei Suenaga, Zhenyu Guan, Jiafeng Hua, Yier Jin, Jianwei LiuIEEE S&P, 2025 Paper Code
  6. ArcEDB: An Arbitrary-Precision Encrypted Database via (Amortized) Modular Homomorphic Encryption Zhou Zhang, Song Bian, Zian Zhao, Ran Mao, Haoyi Zhou, Jiafeng Hua, Yier Jin, Zhenyu GuanACM CCS, 2024 Paper Code
  7. An eDRAM-Based In-Situ-Computing Processor for Homomorphic Encryption Evaluation on the Edge Luchang Lei, Yongqing Zhu, Xinhang Zou, Yifan He, Zhou Zhang, Zhenyu Guan, Huazhong Yang, Yongpan Liu, Song Bian, Hongyang JiaESSERC, 2024
  8. HEIR: A Unified Representation for Cross-Scheme Compilation of Fully Homomorphic Computation Song Bian, Zian Zhao, Zhou Zhang, Ran Mao, Kohei Suenaga, Yier Jin, Zhenyu Guan, Jianwei LiuNDSS, 2024 Paper Code
  9. AutoHoG: Automating Homomorphic Gate Design for Large-Scale Logic Circuit Evaluation Zhenyu Guan, Ran Mao, Qianyun Zhang, Zhou Zhang, Zian Zhao, Song BianIEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 2024 Paper Code
  10. HE3DB: An Efficient and Elastic Encrypted Database Via Arithmetic-And-Logic Fully Homomorphic Encryption Song Bian*, Zhou Zhang*, Haowen Pan, Ran Mao, Zian Zhao, Yier Jin, Zhenyu GuanACM CCS, 2023 Distinguished Paper Award(* Equal contribution.) Paper Code
  11. DeepMIH: Deep Invertible Network for Multiple Image Hiding Zhenyu Guan, Junpeng Jing, Xin Deng, Mai Xu, Lai Jiang, Zhou Zhang, Yipeng LiIEEE Transactions on Pattern Analysis and Machine Intelligence, 2023 Paper Code

Preprints

  1. RotPIR: Sublinear Single-Server PIR with Efficient Pre-Processing via Oblivious Homomorphic Rotation Zhou Zhang, Song Bian, Zhenyu Guan, Giuseppe PersianoCryptology ePrint Archive, Paper 2026/1336, 2026 Paper

Talks

Querying Encrypted Data with Fully Homomorphic Encryption

  • Doctoral Student Forum, China Cyber Security Congress (CCSC 2026) · Hefei, China Best Presentation Award

SPIRIT: Batch Hintless Single-Server PIR via Stateful Ciphertext Conversion

  • Crypto Reading Group, Beihang University · Beijing, China
  • Cybersecurity Conference of the Chinese Institute of Electronics · Changsha, China

ArcEDB: An Arbitrary-Precision Encrypted Database via (Amortized) Modular Homomorphic Encryption

  • ACM CCS · Salt Lake City, Utah, USA

HE3DB: An Efficient and Elastic Encrypted Database Via Arithmetic-And-Logic Fully Homomorphic Encryption

  • ACM CCS · Copenhagen, Denmark
  • Huawei FHE Seminar · Beijing, China

Teaching

  • Cryptographic Applications in Security

    Teaching Assistant · Beihang University · Beijing, China · Spring 2024

  • International Engineering Fundamentals

    Teaching Assistant · Beihang University · Beijing, China · Spring 2022

  • Linear Algebra

    Teaching Assistant · Beihang University · Beijing, China · Fall 2020