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  • Encounter metrics and exposure notification
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Encounter metrics and exposure notification

Source(s):  National Institute of Standards and Technology (NIST)

This publication discusses the measurement of aggregate levels of encounters in a population, a concept it calls encounter metrics. Encounter metrics are designed so that they can be deployed while preserving the privacy of individuals.

To this end, encounters are labeled with a random number that cannot be linked to anything that is broadcast at the time of the encounter. Among the applications of encounter metrics is privacy-preserving exposure notification, a system that allows people to obtain a measure of their risk due to past encounters with people who have self-reported to be positive with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-19), the cause of coronavirus disease 2019 (COVID-19). The precise engineering of a system for exposure notification should be targeted to particular environments.

The publication outlines a system for use in the context of a workplace such as the National Institute of Standards and Technology (NIST).



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  • Encounter metrics and exposure notification
  • Publication date 2021
  • Author(s) Peralta, Rene; Robinson, Angela
  • Number of pages 9 p.
  • ISBN/ISSN 10.6028/jres.126.003 (DOI)

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