There are three types of data involved:
1. Your identification and contact details
We require your number and unique identification number so that MOH can reach the right person quickly when they need help for contact tracing. This data is stored in a secure server, never accessed by MOH unless it’s needed for contact tracing purposes, and never shared with third parties.
2. Your TraceTogether Bluetooth data
With your consent, TraceTogether exchanges Bluetooth proximity data with nearby phones running the same app. This data is anonymised and encrypted, and does not reveal your identity or the other person's identity. In order to measure distance, information about the phone models and signal strength recorded is also shared, since different phone models transmit at different power.
This Bluetooth data is stored only on your phone, and only shared with MOH if you unfortunately test positive for COVID-19.
3. App analytics data
TraceTogether uses analytics data to improve how the app works across different phone models and OS versions. For a list of data collected, see FAQ “What kind of application analytics does TraceTogether use?”
These data are only used to support current contact tracing efforts and will be deleted at the end of the outbreak.