...The data is stored locally on each user's device, preventing authorities or other parties from accessing or controlling the data. This repository contains the implementation of the server for encryption keys for the Corona-Warn-App. The Corona-Warn-App is an app that helps trace infection chains of SARS-CoV-2 (which can cause COVID-19) in Germany. The app is based on technologies with a decentralized approach and notifies users if they have been exposed to SARS-CoV-2. Transparency is key to both protecting the app's end-users and encouraging adoption.