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Limited privacy protection and poor sensitivity: Is it time to move on from the statistical linkage key-581?

Version 2 2024-06-06, 04:00
Version 1 2022-11-14, 02:59
journal contribution
posted on 2024-06-06, 04:00 authored by Sean RandallSean Randall, Anna M Ferrante, James H Boyd, Adrian P Brown, James B Semmens
Background: The statistical linkage key (SLK-581) is a common tool for record linkage in Australia, due to its ability to provide some privacy protection. However, newer privacy-preserving approaches may provide greater privacy protection, while allowing high-quality linkage. Objective: To evaluate the standard SLK-581, encrypted SLK-581 and a newer privacy-preserving approach using Bloom filters, in terms of both privacy and linkage quality. Method: Linkage quality was compared by conducting linkages on Australian health datasets using these three techniques and examining results. Privacy was compared qualitatively in relation to a series of scenarios where privacy breaches may occur. Results: The Bloom filter technique offered greater privacy protection and linkage quality compared to the SLK-based method commonly used in Australia. Conclusion: The adoption of new privacy-preserving methods would allow both greater confidence in research results, while significantly improving privacy protection.

History

Journal

Health Information Management Journal

Volume

45

Article number

2

Pagination

71-79

Location

London, Eng.

ISSN

1322-4913

eISSN

1833-3575

Language

English

Publication classification

C1 Refereed article in a scholarly journal

Issue

2

Publisher

SAGE Publications