Yes, SK's contact tracing approach invades civil liberties in ways Americans won't (and shouldn't) abide. That's why new, privacy-protecting solutions (e.g. DP3T) are being developed and should be encouraged. (Why the backtracking, EU?) https://t.co/GfWvlen3dT ...
A European consortium (PEPP-PT) has the mandate to develop a secure and private protocol to implement an app to trace contacts between people so that possible COVID-19 infection risk can be managed (the idea is to have an app that records who you were in proximity of so that if any of them get infected, you can be notified, ideally making this information anonymous and not stored in any server but just your phone - decentralized).
This consortium asked a group of experts to start working out this protocol, which they named DP-3T. They have been doing so with a decentralized and open source approach: the code they are working on is public so anyone can check how it works and be sure that personal information is safe.
However, the consortium, suddenly and without notice to the group in charge of developing it, dropped any mention of DP-3T and didn't invite them to meetings going forward. The suspicion is that they will develop a protocol whose code won't be public and probably not decentralized either. This makes it impossible to know what they would do with the data that any such app would gather from citizens.
TL;DR: European consortium mandated to develop secure and private app to trace COVID-19 infections can't for the moment guarantee that the app will be secure and private, and has sidelined ongoing efforts in that direction.