Efficient protocols for private database queries

Tushar Kanti Saha, Mayank, Takeshi Koshiba

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    5 Citations (Scopus)

    Abstract

    We consider the problem of processing private database queries over encrypted data in the cloud. To do this, we propose a protocol for conjunctive query and another for disjunctive query processing using somewhat homomorphic encryption in the semi-honest model. In 2016, Kim et al. [IEEE Trans. on Dependable and Secure Comput.] showed an FHE-based query processing with equality conditions over encrypted data. We improve the performance of processing private conjunctive and disjunctive queries with the low-depth equality circuits than Kim et al.’s circuits. To get the low-depth circuits, we modify the packing methods of Saha and Koshiba [APWConCSE 2016] to support an efficient batch computation for our protocols with a few multiplications. Our implementation shows that our protocols work faster than Kim et al.’s protocols for both conjunctive and disjunctive query processing along with a better security level. We are also able to provide security to both attributes and values appeared in the predicate of the conjunctive and disjunctive queries whereas Kim et al. provided the security to the values only.

    Original languageEnglish
    Title of host publicationData and Applications Security and Privacy XXXI - 31st Annual IFIP WG 11.3 Conference, DBSec 2017, Proceedings
    PublisherSpringer Verlag
    Pages337-348
    Number of pages12
    Volume10359 LNCS
    ISBN (Print)9783319611754
    DOIs
    Publication statusPublished - 2017
    Event31st Annual IFIP WG 11.3 Conference on Data and Applications Security and Privacy, DBSec 2017 - Philadelphia, United States
    Duration: 2017 Jul 192017 Jul 21

    Publication series

    NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
    Volume10359 LNCS
    ISSN (Print)0302-9743
    ISSN (Electronic)1611-3349

    Other

    Other31st Annual IFIP WG 11.3 Conference on Data and Applications Security and Privacy, DBSec 2017
    CountryUnited States
    CityPhiladelphia
    Period17/7/1917/7/21

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    Keywords

    • Batch technique
    • Conjunctive
    • Disjunctive
    • Homomorphic Encryption
    • Packing method
    • Private Database Queries

    ASJC Scopus subject areas

    • Theoretical Computer Science
    • Computer Science(all)

    Cite this

    Saha, T. K., Mayank, & Koshiba, T. (2017). Efficient protocols for private database queries. In Data and Applications Security and Privacy XXXI - 31st Annual IFIP WG 11.3 Conference, DBSec 2017, Proceedings (Vol. 10359 LNCS, pp. 337-348). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 10359 LNCS). Springer Verlag. https://doi.org/10.1007/978-3-319-61176-1_19