The history of encryption it includes doesn’t dwell West Germany.
The West German government had a reputation for supporting strong crypto (unlike the East Germans and Nazis).
They were aware that many of their day-to-day communications were being intercepted by the East Germans (much as they intercepted East German communications).
Many West Germans had loved ones in East Germany who could at least in theory face negative consequences for the actions of West Germans.
West Germany simply couldn’t be free without strong crypto.
This is such a weird take, considering the reality how the NSA mass spying on Germans, and even Merkel, is quite legal and has been for many decades [0].
So while NATO forces are really big on supporting "strong crypto" for their own practical needs, what they were not really big on is supporting strong privacy rights for them West German people, as that would just "complicate" finding all those Communist spies and sympathizers.
Who were suspected to be everywhere, as split Germany was pretty much the main battlefield of the covert cold war.
That's why the West German G-10 law was specifically modified [1] at the request of the NSA [2] to legalize their, and that of NATO forces, mass spying on German citizens.
Btw: In terms of "Nazi encryption" it's a bit odd to make a statement like that, the Nazis, just like the USSR, the US, or pretty much any formal military force, did and still do use "strong crpyto" for their own needs [3].
That's why conflating encryption tech with privacy rights, as if they're just synonyms, is quite misleading.
The West German government had a reputation for supporting strong crypto (unlike the East Germans and Nazis).
They were aware that many of their day-to-day communications were being intercepted by the East Germans (much as they intercepted East German communications).
Many West Germans had loved ones in East Germany who could at least in theory face negative consequences for the actions of West Germans.
West Germany simply couldn’t be free without strong crypto.