Why would one use radio instead of the Internet for secure communications?
This question is inspired by someone's comment on this question elsewhere
In the modern era of Internet and encryption it's quite surprising that countries like Russia still regularly use coded radio systems (Mazielka/Perelivt) to communicate with their embassies
One reason to do that might be to avoid the risk of the host country disconnecting the Internet link to the embassy, though it's easily mitigated by using a satellite-based connection.
One could also imagine that radio transmissions might be slightly harder to intercept, because all Internet traffic flows through a limited number of intermediate nodes, where interception is relatively easy to implement. This, too, can be mitigated by using satellite links instead of land links that cross the origin country boundaries.
What are the actual advantages of RF communications, in the particular scenario of a country's Ministry of Foreign Affairs communicating with its diplomatic posts in other countries, where alternative Internet-based channels already exist?
