ENKI: Access Control for Encrypted Query Processing

Summary: ENKI introduces an encryption-based access-control model for secure, multi-user query processing on outsourced, encrypted data with restricted access. Offloading most processing to the server, it minimizes client-side work with modest overhead versus single-user mode; demonstrated on three real-world use cases and TPC-C. (summarized by gpt-5-nano on Feb 09 2026)

Paper ID: h0d75b4d09708a0fb
Venue: SIGMOD
Year: 2015
Pagerank: 5.2905577e-05
Overall Rank: 8,703 | 41.49%
DOI: 10.1145/2723372.2749439

Incoming Non-self Citations Over Time

Authors

1. Isabelle Hang (University of Bremen)
2. Florian Kerschbaum (SAP)
3. Ernesto Damiani (University of Milan)

BibTeX Citation

@inproceedings{hang_sigmod15,
        title = {{ENKI: Access Control for Encrypted Query Processing}},
        author = {Hang, Isabelle and Kerschbaum, Florian and Damiani, Ernesto},
        series = {{SIGMOD} '15},
        booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
        publisher = {Association for Computing Machinery},
        doi = {10.1145/2723372.2749439},
        url = {https://dl.acm.org/doi/10.1145/2723372.2749439},
        year = {2015}
}

Incoming Citations (Sorted by Pagerank)

Showing 1 of 1 citing papers.

Rank	Citing Paper	Year	Venue	Pagerank
12,274	Cryptanalysis of Comparable Encryption in SIGMOD'16	2017	SIGMOD	4.9793485e-05

Outgoing Citations (Sorted by Pagerank)

Showing 5 of 5 cited papers.

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

Rank	Cited Paper	Year	Venue	Pagerank
115	Executing SQL over Encrypted Data in the Database-Service-Provider Model	2002	SIGMOD	0.00031742473
311	Order Preserving Encryption for Numeric Data	2004	SIGMOD	0.00021327947
568	Extending Query Rewriting Techniques for Fine-Grained Access Control	2004	SIGMOD	0.00016262553
1,872	Information Sharing Across Private Databases	2003	SIGMOD	9.4632771e-05
8,312	Over-encryption: Management of Access Control Evolution on Outsourced Data	2007	VLDB	5.3572454e-05

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3	9,189	Integrity-based Attacks for Encrypted Databases and Implications	2021	CIDR
4	12,750	Building Disclosure Risk Aware Query Optimizers for Relational Databases	2010	VLDB
5	12,565	eSkyline: Processing Skyline Queries over Encrypted Data	2013	VLDB
6	5,121	Secure Query Processing with Data Interoperability in a Cloud Database Environment	2014	SIGMOD
7	5,755	SDB: A Secure Query Processing System with Data Interoperability	2015	VLDB
8	115	Executing SQL over Encrypted Data in the Database-Service-Provider Model	2002	SIGMOD
9	420	Processing Analytical Queries over Encrypted Data	2013	VLDB
10	4,279	Querying Encrypted Data	2014	SIGMOD