The world is under an ongoing pandemic, COVID-19, of a scale last seen a century ago. Contact tracing is one of the most critical and highly effective tools for containing and breaking the chain of infections especially in the case of infectious respiratory diseases like COVID-19. Thanks to the technological progress in our times, we now have digital mobile applications like the Corona-Warn-App for digital contact tracing. However, due to the invasive nature of contact tracing, it is very important to preserve the privacy of the users. Privacy preservation is important for increasing trust in the app and subsequently enabling its widespread usage in a privacy-valuing population. In this paper, we present a visual simulation of the working of the Corona-Warn-App to demonstrate how the privacy of its users is preserved, how they're notified of infectious contacts and how it helps in containing the spread of COVID-19.

翻译：联系追踪是遏制和打破感染链的最关键和最有效工具之一,特别是在COVID-19等传染性呼吸道疾病的情况下。由于我们时代的技术进步,我们现在有了像Corona-Warn-App等数字联系追踪的数字移动应用,然而,由于联系追踪的侵入性质,保护用户的隐私非常重要。隐私保护对于增强对应用程序的信任并随后使其在隐私估价人口中的广泛使用非常重要。我们在本文件中对Corona-Warn-App的工作进行视觉模拟,以展示如何保护用户的隐私,如何向他们通报传染性接触,以及如何帮助控制COVID-19的传播。