The ministries are considering implementing a federal cloud. So-called hyperscalers such as Microsoft and Google come into question for this. But this involves dangers, which Peter Ganten discusses in an article in Kommune21:
The operation of the cloud software of the hyperscalers by European companies should solve this problem. However, the manufacturers can install or retrofit backdoors with updates at any time – for example, in order to provide security authorities in other countries with targeted information.
Likewise, the specification of defined interfaces for connecting specialized procedures and applications severely limits the flexibility of public institutions and leads to a much greater security risk, as this can just as easily be controlled and exploited by third parties, according to Ganten. You can read about the solution he sees for these security risks at kommunale21.de (available in german).