Comment by matz1

> I want to know how do you imagine a method of authentication not requiring any privacy could work

>Facial Recognition?

That could be one way

> I will just grab your profile picture.

Then maybe fix it to detect whether its a real person or just a picture.

Or maybe there are better way, I don't know.

Like I said, I'm not the expert, I wouldn't know every solution to every problem.

My point is we should spent the effort on figuring out that problem instead of trying to keep thing hiding.