At the core of every 3ID is a globally unique decentralized identifier, called a DID. DIDs are a way to establish a universal cross-platform identity that is separate from any single key pair or login system.
3IDs are controlled by their keychain, a flexible authentication system that allows users to link one or many wallet keys. For more flexibility, users can link to contracts and assign owners or delegates.
3ID signatures can be used to access control resources such as databases, APIs, and servers. Using 3ID eliminates the need to for users to manage additional keys for these services.