Review Article

Ensuring Confidentiality of Geocoded Health Data: Assessing Geographic Masking Strategies for Individual-Level Data

Figure 5

Graphical representation of common geographic masking techniques. The red dot indicates the original location and the blue dot one of the many possible masked locations.
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(a) Random direction and fixed radius
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(b) Random perturbation within a circle
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(c) Gaussian displacement
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(d) Donut masking
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(e) Bimodal Gaussian displacement