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A mobile application developed by the Government Technology Agency (GovTech) that helps in contact tracing for Covid-19 has been installed by more than 620,000 users since its launch last Friday.
With a decision to make the technology behind it available to developers around the world, even more people could stand to benefit.
Developed in collaboration with the Health Ministry (MOH), the TraceTogether mobile app works by exchanging short-distance Bluetooth signals between phones.
Users need to submit only a Singapore number to MOH when they register, and each phone will then be given a random, anonymised user ID.
At regular intervals, a temporary ID is generated based on this user ID, and it is the temporary ID that is exchanged over Bluetooth when users come into contact with each other.
The app uses Bluetooth signal strength to estimate the distance between users and the duration of their encounters.
A record of this is stored on each user’s phone in an encrypted form for 21 days. No other personal information or location data is collected.
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