She drew an analogy between digital encryption and a locked door

And there’s the proof of someone who doesn’t understand what encryption is.

The analogy is closer to not knowing which house to go to.

Once you’ve given someone the address, you can’t stop them telling other people where the house is. And once you’ve given someone the encryption key, you can’t take it back. There is no “master key” that unlocks just for law enforcement.

The Golden Age Barks comics are still the best.