No, I’m not particularly expert. But I see no reason why a back door can’t be created by the encryption manufacturer, for which they hold the key and provide the data on a warrant from a judge. In this case the user is the manufacturer.
Just saying this approach is ‘not secure’ is not an argument.
It doesn’t matter who holds the key. Even the supposed security experts can’t keep their keys to themselves.
Or look at it slightly differently. Apple, Microsoft, Nintendo, Sony — all of these companies have more money and experts than god, and spend it trying to make perfectly unbreakable schemes so that they can lock you into using the hardware you bought only in the way that makes them the most money.
They all failed. All of them have been broken, fixed, and broken again. Over and over and over.
How can you possibly think that a system with a deliberate weakness in it could somehow be completely secure when the ones that are designed to harder than diamond, right down to the hardware, are not?
What is the deliberate weakness? I can’t recall, for example Apple, being hacked into by criminals. Do yo have a citation?