NDLI: Privacy Preserving Data Quality Assessment for High-Fidelity Data Sharing

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Privacy Preserving Data Quality Assessment for High-Fidelity Data Sharing

Content Provider	ACM Digital Library
Author	Rane, Shantanu Freudiger, Julien Brito, Alejandro E. Uzun, Ersin
Abstract	In a data-driven economy that struggles to cope with the volume and diversity of information, data quality assessment has become a necessary precursor to data analytics. Real-world data often contains inconsistencies, conflicts and errors. Such dirty data increases processing costs and has a negative impact on analytics. Assessing the quality of a dataset is especially important when a party is considering acquisition of data held by an untrusted entity. In this scenario, it is necessary to consider privacy risks of the stakeholders. This paper examines challenges in privacy-preserving data quality assessment. A two-party scenario is considered, consisting of a client that wishes to test data quality and a server that holds the dataset. Privacy-preserving protocols are presented for testing important data quality metrics: completeness, consistency, uniqueness, timeliness and validity. For semi-honest parties, the protocols ensure that the client does not discover any information about the data other than the value of the quality metric. The server does not discover the parameters of the client's query, the specific attributes being tested and the computed value of the data quality metric. The proposed protocols employ additively homomorphic encryption in conjunction with condensed data representations such as counting hash tables and histograms, serving as efficient alternatives to solutions based on private set intersection.
Starting Page	21
Ending Page	29
Page Count	9
File Format	PDF
ISBN	9781450331517
DOI	10.1145/2663876.2663885
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2014-11-03
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Data quality assessment Privacy and confidentiality Cryptographic protocols
Content Type	Text
Resource Type	Article

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