Contact tracing

Collects the different approaches to implementing technology-assisted contact tracing.

As it is common today, we use the term “contact tracing” although a more accurate term may be “exposure notification”.

We found the following implementation choices:

Apple/Google contact tracing: The approach to contact tracing taken by the Apple/Google project
DP-3T contact tracing: The approach to contact tracing taken by the Decentralized Privacy-Preserving Proximity Tracing project
Contact tracing with changing pseudonyms created by iterating a hash function: Contact IDs are derived from a value that progresses through iteration of a secure hash function
Manual contact tracing: Contact tracing is performed through in-person interviews and research
PEPP-PT contact tracing: The approach to contact tracing taken by the Pan-European Privacy-Preserving Proximity Tracing project
Contact tracing with static Contact IDs: The App User is identified with a pseudonym that never changes