What about granting secure and confidential access to a door via an access token? You can program and build it all yourself on the Polkadot Devnet, a precursor to a sovereign internet that empowers people and opens new use cases for the machine economy. The main advantage of building on a sovereign internet is that no one can take the access away from you. Which door do you want to unlock next? Check out what @OliverTaleYazdi built below👇