Can the Swiss contact tracing app balance privacy and infection control?

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The Swiss Contact Tracing App Aims to Balance Privacy and Infection Control Through a Decentralized Design

Switzerland is piloting a new contact tracing application set for a May 11 launch, designed to aid in controlling the spread of COVID-19 while prioritising user privacy. The app utilises Bluetooth technology to assess infection risk based on proximity, logging this data in an encrypted format directly onto users' devices rather than central servers. This approach seeks to expedite the typically person-based contact tracing process by allowing individuals who test positive to upload their status, thereby notifying close contacts anonymously.
Decentralized Data Logging Enhances Privacy

The core of the Swiss app's privacy-first strategy lies in its decentralized architecture, which aligns with standards set by Apple and Google. Unlike systems that might store extensive data on central servers, potentially raising surveillance concerns, this application keeps records of Bluetooth exchanges solely on the user's smartphone. This method ensures that the collected proximity data remains on the device, offering a significant safeguard against intrusive government monitoring.
Bluetooth Technology Facilitates Risk Assessment

The application functions by leveraging Bluetooth signals to detect when devices are within a two-meter radius for a cumulative period of 15 minutes. This information is logged in an encrypted manner on each participating smartphone. If an individual is diagnosed with COVID-19, they have the option to upload their positive test result's identifier to the system. This action triggers the app to anonymously alert other users who have had close contact with the infected individual, prompting them to check their risk status and potentially contact health authorities.
Potential to Accelerate Public Health Response

The primary objective of this digital tool is to significantly speed up the contact tracing process, which is traditionally a manual and time-consuming endeavour. By enabling a faster notification system, the app aims to swiftly identify and inform individuals who may have been exposed to the virus. This rapid response is crucial in mitigating further spread, especially given that the virus can be transmitted by asymptomatic carriers, as highlighted by the project's director, Marcel Salathe.
Public Reception Remains Divided

While the app is being tested and prepared for launch, public opinion in areas like Geneva indicates a mixed reception. Some residents, such as Hamza Fawaz, express reservations regarding data protection and have indicated they will not use the application. Conversely, others, like Beatrice Mallet, view the app as a potentially valuable tool that could help expedite the resolution of the health crisis, making them "completely ready" to adopt it. The Swiss Parliament is slated to deliberate on the app's implications in the coming week.

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Can the Swiss contact tracing app balance privacy and infection control?

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