R2T: Instance-optimal Truncation for Differentially Private Query Evaluation with Foreign Keys
Summary: Presents R2T, the first DP mechanism for SPJA queries with foreign-key constraints (node-DP graph-pattern counting). Offers an instance-optimal truncation framework, deployable on any RDBMS, delivering strong utility gains over prior DP methods. (summarized by gpt-5-nano on Feb 09 2026)
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Authors
- 1. Wei Dong (Hong Kong University of Science and Technology)
- 2. Juanru Fang (Hong Kong University of Science and Technology)
- 3. Ke Yi (Hong Kong University of Science and Technology)
- 4. Yuchao Tao (Duke University)
- 5. Ashwin Machanavajjhala (Duke University)
BibTeX Citation
@inproceedings{dong_sigmod22,
title = {{R2T: Instance-optimal Truncation for Differentially Private Query Evaluation with Foreign Keys}},
author = {Dong, Wei and Fang, Juanru and Yi, Ke and Tao, Yuchao and Machanavajjhala, Ashwin},
series = {{SIGMOD} '22},
booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
publisher = {Association for Computing Machinery},
doi = {10.1145/3514221.3517844},
url = {https://dl.acm.org/doi/10.1145/3514221.3517844},
year = {2022}
}
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