Private comparison protocol and its application to range queries

Tushar Kanti Saha, Mayank, Deevashwer, Takeshi Koshiba

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

    1 Citation (Scopus)

    Abstract

    We consider the problem of private comparison protocol and its application to private range queries for accessing a private database. Very recently, Saha and Koshiba (NBiS 2017) proposed an efficient privacy-preserving comparison protocol using ring-LWE based somewhat homomorphic encryption (SwHE) in the semi-honest model. The protocol took 124 ms (resp., 125 ms) for comparing two 16-bit (resp., 32-bit) integers. But this protocol is not efficient enough to process range queries to a large database where several thousand comparisons are required. In this paper, we propose an efficient parity-based private comparison protocol and show its application to private range queries with a modified packing method. Here the security of the protocol is also ensured by ring-LWE based SwHE in the same semi-honest model. Our practical experiments show that our comparison protocol enables us to do a single comparison in 84 ms (resp., 85 ms) for 16-bit (resp., 32-bit) integers which is more efficient than Saha et al.’s protocol. Besides, it takes about 0.499 s (resp., 2.247 s) to process a 3-out-of-11 range query in a database of 100 records (resp., 1000 records) including 11 attributes, which outperform state of the art.

    Original languageEnglish
    Title of host publicationInternet and Distributed Computing Systems - 10th International Conference, IDCS 2017, Proceedings
    PublisherSpringer-Verlag
    Pages128-141
    Number of pages14
    ISBN (Print)9783319977942
    DOIs
    Publication statusPublished - 2018 Jan 1
    Event10th International Conference on Internet and Distributed Computing Systems, IDCS 2017 - Mana Island, Fiji
    Duration: 2017 Dec 112017 Dec 13

    Publication series

    NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
    Volume10794 LNCS
    ISSN (Print)0302-9743
    ISSN (Electronic)1611-3349

    Other

    Other10th International Conference on Internet and Distributed Computing Systems, IDCS 2017
    CountryFiji
    CityMana Island
    Period17/12/1117/12/13

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    Keywords

    • Batch technique
    • Comparison protocol
    • Range query
    • Somewhat homomorphic encryption

    ASJC Scopus subject areas

    • Theoretical Computer Science
    • Computer Science(all)

    Cite this

    Saha, T. K., Mayank, Deevashwer, & Koshiba, T. (2018). Private comparison protocol and its application to range queries. In Internet and Distributed Computing Systems - 10th International Conference, IDCS 2017, Proceedings (pp. 128-141). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 10794 LNCS). Springer-Verlag. https://doi.org/10.1007/978-3-319-97795-9_12