Conversation

What it means when govts demand your encryption must have a "backdoor only police gets key to",
demonstrated by an IT-security and lockpicking expert at SHA2017.

All backdoors are there for everyone to use, 24/7/365, not only those desired and at the desired time. It's in the nature of the concept and there is no way to make it otherwise.
The politicians and others demanding you have them demands you be kept intentionally less safe, for their convenience.