> So it will be illegal to use Whisper systems Signal?
No. If Whisper systems didn't comply, they'd be blocked.
> Is there any mechanism for Germany to influence corporations outside of Germany?
Well, if they're in a EU country, there are plenty. For non-EU: not so much.
Seehofer is known to make outlandish proposals, however. It's likely just a way to start the debate and position himself/his party as "tough on crime" before tomorrow's EU election in Germany. I don't believe that it will happen anywhere close to this, since Germany isn't a market so large you can't ignore it. Messengers will simply say "oh well", be blocked in Germany and Germans will be unhappy.
What about apps that are not being worked on or have services in Germany? What about signal? So those other apps could try to ignore court orders or something from random other countries, but how will this end up?
