Exposure Notification

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      Open Standard
      
    

    
Privacy-preserving BLE beacon protocol developed for COVID-19 contact tracing using rotating identifiers.

    

      by Apple & Google
      
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      Introduced 2020
      
      
    

  


  
  

    

    

      
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Frequently Asked Questions


  

    
    

      
      

        
A BLE beacon is a small device that periodically broadcasts its identifier using BLE advertising packets. Nearby smartphones can detect these broadcasts for proximity detection, indoor positioning, and context-aware applications.