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It comes in the form of either a smartphone app or a Bluetooth token.
Mr Tan added that the government is the "custodian" of data collected through the system, and that "stringent measures" are in place to ensure that it can only be used for "authorised purposes."
As of Monday, more than 4.2 million people, or 78 per cent of Singapore's population, have enrolled in the TraceTogether program, Lawrence Wong, co-chair of the multi-ministry task force tackling the COVID-19 pandemic, confirmed.
According to information posted on TraceTogether's website, the system only records users who have come into close contact with one another by exchanging Bluetooth signals on their tokens but does not record their geolocation data.