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UK’s NHS won’t use Apple-Google approach to COVID-19 tracking

Apple and Google are expected to release their contact tracing technology to developers tomorrow. The UK’s coronavirus contact-tracing app is set to use a different model to the one proposed by Apple and Google, despite concerns raised about privacy and performance.

The NHS says it has a way to make the software work “sufficiently well” on iPhones without users having to keep it active and on-screen. That limitation has posed problems for similar apps in other countries. Experts from GCHQ’s National Cyber Security Centre have aided the effort.

NCSC indicated that its involvement has been limited to an advisory role.

“Engineers have met several core challenges for the app to meet public health needs and support detection of contact events sufficiently well, including when the app is in the background, without excessively affecting battery life,” said a spokeswoman for NHSX, the health service’s digital innovation unit.

Another potential drawback, is that the centralized approach may eat up more power. Apple’s solution lets the contact tracing happen in the background, but the UK’s app has to be woken up every time the device detects another nearby device running the same software.

By choosing the centralized approach, the NHS is aligning more with Australia than some of its EU counterparts. Australia’s app, which was released over the weekend, uses a mix of Bluetooth and stored contact data on both the app and servers. Germany, on the other hand, has switched its stance and is now pursuing a decentralized architecture, as are Austria, Estonia and Switzerland.

So far, the European Commission and the EU’s data protection watchdog support both models but note that the differences aren’t entirely clear, EUobserver reports. In either case, the challenge will be getting enough widespread adoption for the apps to be effective.

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