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PANDA: Partitioned Data Security on Outsourced Sensitive and Non-sensitive Data

Published: 12 October 2020 Publication History

Abstract

Despite extensive research on cryptography, secure and efficient query processing over outsourced data remains an open challenge. This article continues along with the emerging trend in secure data processing that recognizes that the entire dataset may not be sensitive and, hence, non-sensitivity of data can be exploited to overcome limitations of existing encryption-based approaches. We first provide a new security definition, entitled partitioned data security, for guaranteeing that the joint processing of non-sensitive data (in cleartext) and sensitive data (in encrypted form) does not lead to any leakage. Then, this article proposes a new secure approach, entitled query binning (QB), that allows secure execution of queries over non-sensitive and sensitive parts of the data. QB maps a query to a set of queries over the sensitive and non-sensitive data in a way that no leakage will occur due to the joint processing over sensitive and non-sensitive data. In particular, we propose secure algorithms for selection, range, and join queries to be executed over encrypted sensitive and cleartext non-sensitive datasets. Interestingly, in addition to improving performance, we show that QB actually strengthens the security of the underlying cryptographic technique by preventing size, frequency-count, and workload-skew attacks.

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  1. PANDA: Partitioned Data Security on Outsourced Sensitive and Non-sensitive Data

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    cover image ACM Transactions on Management Information Systems
    ACM Transactions on Management Information Systems  Volume 11, Issue 4
    Special Issue on Analytics for Cybersecurity and Privacy, Part 1
    December 2020
    244 pages
    ISSN:2158-656X
    EISSN:2158-6578
    DOI:10.1145/3426166
    Issue’s Table of Contents
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    Publication History

    Published: 12 October 2020
    Online AM: 07 May 2020
    Accepted: 01 April 2020
    Revised: 01 March 2020
    Received: 01 November 2019
    Published in TMIS Volume 11, Issue 4

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    Author Tags

    1. Data outsourcing
    2. Intel SGX
    3. data encryption
    4. data partitioning
    5. multi-party computation
    6. non-sensitive data
    7. output-size attack
    8. scalable cryptography
    9. secret-sharing
    10. sensitive data
    11. workload skew attack

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