The Decentralized Identity Provider (DIP) provides the building blocks to establish an open cross-chain identity ecosystem. Using DIP, any chain can become an identity provider, and parachains can choose the identity provider/s they want to cooperate with.
This means that a user could use their KILT identity to log into any dapp and authenticate transactions on any parachain that integrates DIP with KILT – for example, they could use the same identity across Astar, Frequency, Zeitgeist, etc.
Read more about DIP here.