Access control across the entire web

Typical websites are isolated and have no idea who is accessing their content, and controlled access to data is limited to the permission settings between individual accounts on a website. If you want to share information in a controlled manner outside the website, you're out of luck. Hubzilla allows fine-grained permissions for information shared across the grid, and websites on hubs are identity-aware. Magic Auth enables seamless authentication across independent websites in a way that was not possible before.