Access Control - How to Prove That You Own Something Without Exposing Anything?

How can i prove that i've a membership without telling you who i am or what membership i have? In that way, you get access to something without expelling even if you want to do it from the standpoint of light. And maybe notewer, probably inot carculated for that. But like, i could think of other men. Like we're doffly chetting with a bunch of different tems. About how they think about doing this, because they ollso weigh beyond my understanding of critography and intesings. You i just believe the statement. I have a hi Olnes.