The intent of the Stopp Corona-App is to help interrupt the chain of infection of the Corona virus as fast as possible. It uses an anonymous contact diary which logs personal encounters using a "digital handshake". If one person shows symptoms of the corona infection,...

Symptoms are queried in the app. For example, whether the affected persons have a cold, cough or fever. The answers are transmitted in encrypted form to the Health Service of the City of Vienna (MA 15). This is to relieve the authorities and shorten the...