https://tech.newstatesman.com/coronavirus/germany-decentralised-coronavirus-contact-tracing-app

Germany has swerved from a centralised to decentralised approach to its coronavirus contact-tracing app. Chancellery minister Helge Braun and health minister Jens Spahn announced in a joint statement on Sunday that Germany would adopt a “decentralised” approach to Covid-19 contact tracing, and ditch the centralised alternative the country had been working on.

“This app should be voluntary, meet data protection standards and guarantee a high level of IT security,” they said. “The main epidemiological goal is to recognise and break chains of infection as soon as possible.”