Cryptography · Secure Computation · Privacy-Preserving Systems
Ant International, Ant Group

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I am currently with Ant International, Ant Group, working on cryptography, secure computation, and privacy-preserving systems. My research spans both cryptographic protocol design and efficient system implementation, with a particular interest in multiparty computation, private set operations, oblivious transfer, and privacy-preserving machine learning.

Previously, I was a member of the SecretFlow team at Ant Group, where I contributed to the development of OT/VOLE-related components in YACL. I am also familiar with the design and implementation of fundamental MPC operators in the Cheetah, Semi2k, and SPDZ2k backends of SPU.

• Secure multiparty computation
• Private set intersection and private set operations
• Maliciously secure cryptographic protocols
• Oblivious transfer, VOLE, and authenticated correlations
• Privacy-preserving machine learning and retrieval
• Proxy re-encryption and lattice-based cryptography

UM-PSO: A Unified Multi-Party Framework for Private Set Operations with Malicious-Majority Security
Yaxi Yang, Xiaojian Liang, Weizhan Jing, Ye Dong, Xiangfu Song, Fangyuan Sun, Pu Duan, and Tianwei Zhang.
Cryptology ePrint Archive, Paper 2026/1537, 2026.
[ePrint] [PDF]

Pisces: Cryptography-based Private Retrieval-Augmented Generation with Dual-Path Retrieval
Xiaojian Liang†, Lushan Song†, Shishuai Du†, Weicheng Zhu, Tan Li Hui Faith, Jun Jie Sim, Haibing Jin, Zhenghao Wu, Yingting Liu, Xin Zhang, Jiang-Ming Yang, and Pu Duan.
International Conference on Learning Representations (ICLR), 2026.
[Paper] [Code]

Secret-Shared Shuffle from Authenticated Correlations
Xiangfu Song†, Xiaojian Liang†, Ye Dong, Jianli Bai, Pu Duan, Changyu Dong, Tianwei Zhang, and Ee-Chien Chang.
Public-Key Cryptography (PKC), LNCS 16552, pp. 321–354, 2026.
[Paper] [DOI] [ePrint] [Code]

Maliciously Secure Circuit Private Set Intersection via SPDZ-Compatible Oblivious PRF
Yaxi Yang, Xiaojian Liang, Xiangfu Song, Ye Dong, Linting Huang, Hongyu Ren, Changyu Dong, and Jianying Zhou.
Proceedings on Privacy Enhancing Technologies (PoPETs), 2025(2), pp. 680–696, 2025.
[Paper] [DOI] [ePrint] [Code]

Attribute-Based Conditional Proxy Re-Encryption in the Standard Model under LWE
Xiaojian Liang, Jian Weng, Anjia Yang, Lisha Yao, Zike Jiang, and Zhenghao Wu.
European Symposium on Research in Computer Security (ESORICS), LNCS 12973, pp. 147–168, 2021.
[Paper] [DOI] [ePrint]

† Equal contribution.

Cryptography-based private retrieval-augmented generation with dual-path retrieval.

Implementation and experimental artifact for secret-shared shuffle from authenticated correlations.

Implementation and experimental artifact for maliciously secure circuit-based private set intersection.

Contributions to the development of OT/VOLE-related cryptographic components.