Digital radio from prisons, airports and power suppliers in Germany is usually unencrypted and simple to intercept. Critical infrastructure specialists warn of serious safety dangers.
https://www.spiegel.de/politik/deutschland/kritische-infrastruktur-abhoergefahr-bei-funkverbindungen-in-deutschland-a-0afbfcc7-df55-4225-8877-fe124814204b#ref=rss