Ruida Wang

Ruida Wang

Focusing on Cryptography especially Fully Homomorphic Encryption (FHE).

I’m a Research Associate at Institute of Information Engineering, Chinese Academy of Sciences (IIE, CAS).

My research focuses on Cryptography, with a particular emphasis on the theory, implementation and application of Fully Homomorphic Encryption (FHE).

You can find my publications and citation statistics on my
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  • My research focuses on Cryptography, with a particular emphasis on the theory, implementation and application of Fully Homomorphic Encryption (FHE).
  • I obtained my PhD degree in cybersecurity at IIE, CAS.
  • Before coming to IIE, I obtained my Bachelor’s degree in Mathematics and Applied Mathematics at Taishan College, Shandong University.

🔥 News

  • Our paper Can Verifiable PIR Match the Online Efficiency of SimplePIR? has been accepted to IEEE S&P 2027.
  • Our paper Three-Round Weak Non-Malleable Zero-Knowledge Argument has been accepted to ASIACRYPT 2026.
  • Our paper Decoupled TFHE-type Functional Bootstrapping has been accepted to ACM CCS 2026.

📝 Selected Publications

Can Verifiable PIR Match the Online Efficiency of SimplePIR?
Xinxuan Zhang, Ruida Wang*, Zirui Wang, Yuming Guo, Jikang Bai, Yuanju Wei, Yi Deng, Xianhui Lu
IEEE Symposium on Security and Privacy (S&P) • 2027
Accepted, to appear.

Three-Round Weak Non-Malleable Zero-Knowledge Argument
Xinxuan Zhang, Yuanju Wei, Zhichao Wang, Zhongliang Zhang, Ming Yang, Ruida Wang, Yi Deng*, Hailong Wang
International Conference on the Theory and Application of Cryptology and Information Security (ASIACRYPT) • 2026
Accepted, to appear. Paper · PDF

Circuit Bootstrapping: Faster and Smaller
Ruida Wang, Yundi Wen, Zhihao Li, Xianhui Lu*, Benqiang Wei, Kun Liu, Kunpeng Wang
Annual International Conference on the Theory and Applications of Cryptographic Techniques (EUROCRYPT) • 2024

Refined TFHE Leveled Homomorphic Evaluation and Its Application
Ruida Wang, Jincheol Ha (co-first author), Xuan Shen, Xianhui Lu*, Chunling Chen, Kunpeng Wang, Jooyoung Lee*
ACM SIGSAC Conference on Computer and Communications Security (CCS) • 2025

Phalanx: An FHE-Friendly SNARK for Verifiable Computation on Encrypted Data
Xinxuan Zhang, Ruida Wang*, Zeyu Liu, Binwu Xiang, Yi Deng*, Xianhui Lu*
ACM SIGSAC Conference on Computer and Communications Security (CCS) • 2025

Decoupled TFHE-type Functional Bootstrapping
Zhihao Li, Xuan Shen, Xianhui Lu*, Ruida Wang, Yuan Zhao, Zhiwei Wang
ACM SIGSAC Conference on Computer and Communications Security (CCS) • 2026

* Corresponding author.

💻 Code and Open Source

LightFHE: Circuit Bootstrapping
Our NTT-based (EUROCRYPT 2024) and FFT-based (CCS 2025) circuit bootstrapping implementations are available in LightFHE.
NTT-based implementation (C++ / OpenFHE) · FFT-based implementation (Rust)

AES Transciphering in the HE.org Benchmark Suite
Our AES transciphering code from Refined TFHE Leveled Homomorphic Evaluation and Its Application (CCS 2025) is included as the reference implementation for the AES transciphering workload in the FHE benchmarking suite of HomomorphicEncryption.org (HE.org).
Benchmark project · Reference implementation and attribution

📖 Educations

  • I obtained my PhD degree in cybersecurity at IIE, CAS.
  • Before coming to IIE, I obtained my Bachelor’s degree in Mathematics and Applied Mathematics at Taishan College, Shandong University.

🧪 Research Keywords

Cryptography · FHE