The Bluetooth-based virus tracking apps are designed to be more privacy-friendly than tracking techniques that use GPS or cellphone data. They use Bluetooth to broadcast and receive an encrypted, pseudonymous signal from nearby phones and create a log of interactions that remain on the phone, so users' names and numbers are not disclosed. — Reuters
SINGAPORE/NEW DELHI: When Singapore launched the first smartphone app of its kind last month to identify and alert people who had interacted with carriers of the novel coronavirus, the city-state of roughly 5.7 million people had 385 cases of infections.
But even as cases in the country – which is in lockdown – have surged past 9,000, only about one in five people have downloaded the app, TraceTogether, which uses Bluetooth signals to log when people have been close to one another.
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