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Femur: A Flexible Framework for Fast and Secure Querying from Public Key-Value Store

Summary: Introduces distance-based indistinguishability to obtain provable privacy–performance trade-offs for public key-value querying. Femur combines a space-efficient learned index, noise-based obfuscation of storage ranges, and a variable-range PIR to adaptively maximize throughput (up to 163.9x) under relaxed privacy. (summarized by gpt-5-nano on Feb 09 2026)

Paper ID
hdf5726bce297a940
Venue
SIGMOD
Year
2025
Pagerank
5.3350162e-05
Overall Rank
8,418 | 43.41%
DOI
10.1145/3725299

Incoming Non-self Citations Over Time

Authors

BibTeX Citation

@inproceedings{zhang_sigmod25,
        title = {{Femur: A Flexible Framework for Fast and Secure Querying from Public Key-Value Store}},
        author = {Zhang, Jiaoyi and Peng, Liqiang and Sha, Mo and Liu, Weiran and Li, Xiang and Wang, Sheng and Li, Feifei and Gao, Mingyu and Zhang, Huanchen},
        series = {{SIGMOD} '25},
        booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
        publisher = {Association for Computing Machinery},
        doi = {10.1145/3725299},
        url = {https://dl.acm.org/doi/10.1145/3725299},
        year = {2025}
}

Incoming Citations (Sorted by Pagerank)

Showing 1 of 1 citing papers.

Rank Citing Paper Year Venue Pagerank
10,477 Loom: Weaving PCS-Preserving and Searchable Cloud Backups for Secure Messaging 2026 SIGMOD 4.9793485e-05
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Outgoing Citations (Sorted by Pagerank)

Showing 39 of 39 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank Cited Paper Year Venue Pagerank
40 The Case for Learned Index Structures 2018 SIGMOD 0.00046284649
61 Integrating Compression and Execution in Column-Oriented Database Systems 2006 SIGMOD 0.000392237
276 Towards Practical Differential Privacy for SQL Queries 2018 VLDB 0.0002234348
311 Order Preserving Encryption for Numeric Data 2004 SIGMOD 0.00021327947
420 Processing Analytical Queries over Encrypted Data 2013 VLDB 0.00018540576
430 ALEX: An Updatable Adaptive Learned Index 2020 SIGMOD 0.00018409112
463 The PGM-index: a fully-dynamic compressed learned index with provable worst-case bounds 2020 VLDB 0.00017804544
848 Benchmarking Learned Indexes 2021 VLDB 0.00013506188
898 Orthogonal Security With Cipherbase 2013 CIDR 0.00013189879
971 Reducing the Storage Overhead of Main-Memory OLTP Databases with Hybrid Indexes 2016 SIGMOD 0.00012766019
1,413 Azure SQL Database Always Encrypted 2020 SIGMOD 0.00010738658
1,550 Updatable Learned Index with Precise Positions 2021 VLDB 0.00010282449
1,644 Arx: An Encrypted Database using Semantically Secure Encryption 2019 VLDB 0.00010004324
2,017 Shrinkwrap: Efficient SQL Query Processing in Differentially Private Data Federations 2019 VLDB 9.1758131e-05
3,451 Building Enclave-Native Storage Engines for Practical Encrypted Databases 2021 VLDB 7.2916928e-05
3,803 CARMI: A Cache-Aware Learned Index with a Cost-based Construction Algorithm 2022 VLDB 7.0127652e-05
3,808 An Empirical Evaluation of Columnar Storage Formats 2024 VLDB 7.0097354e-05
3,900 Adore: Differentially Oblivious Relational Database Operators 2023 VLDB 6.9344494e-05
4,153 LeCo: Lightweight Compression via Learning Serial Correlations 2024 SIGMOD 6.776246e-05
5,121 Secure Query Processing with Data Interoperability in a Cloud Database Environment 2014 SIGMOD 6.2650259e-05
5,397 Order-Preserving Key Compression for In-Memory Search Trees 2020 SIGMOD 6.1490013e-05
5,537 Updatable Learned Indexes Meet Disk-Resident DBMS - From Evaluations to Design Choices 2023 SIGMOD 6.0919359e-05
5,772 OpBoost: A Vertical Federated Tree Boosting Framework Based on Order-Preserving Desensitization 2023 VLDB 5.9989293e-05
6,307 Longshot: Indexing Growing Databases using MPC and Differential Privacy 2023 VLDB 5.8178079e-05
6,496 Operon: An Encrypted Database for Ownership-Preserving Data Management 2022 VLDB 5.7658049e-05
6,505 DProvDB: Differentially Private Query Processing with Multi-Analyst Provenance 2023 SIGMOD 5.760947e-05
6,661 Better than Composition: How to Answer Multiple Relational Queries under Differential Privacy 2023 SIGMOD 5.717454e-05
6,821 Making In-Memory Learned Indexes Efficient on Disk 2024 SIGMOD 5.6720444e-05
7,154 Adaptive Hybrid Indexes 2022 SIGMOD 5.597934e-05
7,558 Doquet: Differentially Oblivious Range and Join Queries with Private Data Structures 2023 VLDB 5.4964611e-05
7,604 Privacy Amplification by Sampling under User-level Differential Privacy 2024 SIGMOD 5.486517e-05
8,802 Pantheon: Private Retrieval from Public Key-Value Store 2023 VLDB 5.2734583e-05
9,345 DP-starJ: A Differential Private Scheme towards Analytical Star-Join Queries 2023 SIGMOD 5.1901916e-05
9,473 PriPL-Tree: Accurate Range Query for Arbitrary Distribution under Local Differential Privacy 2024 VLDB 5.1708619e-05
9,960 Object-oriented Unified Encrypted Memory Management for Heterogeneous Memory Architectures 2024 SIGMOD 5.1038322e-05
9,966 Secure Sampling for Approximate Multi-party Query Processing 2023 SIGMOD 5.1038322e-05
11,225 Jodes: Efficient Oblivious Join in the Distributed Setting 2025 VLDB 4.9793485e-05
11,579 Blitzcrank: Fast Semantic Compression for In-memory Online Transaction Processing 2024 VLDB 4.9793485e-05
11,736 TEE-based General-purpose Computational Backend for Secure Delegated Data Processing 2023 SIGMOD 4.9793485e-05
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