A Decentralized Identifier (DID) is a one-of-a-kind ID that comes from a decentralized platform. It serves as proof that you own a digital identity. Unlike regular IDs that need a central authority to register them, DIDs are universally unique and can be verified using cryptography. You can use them to identify people, organizations, abstract concepts, data models, and even IoT devices.
How Decentralized Identifiers Work
In the DID setup, users can keep multiple accepted IDs like government certificates, educational records, tax documents, and other personal info in a digital wallet. Instead of depending on a central authority to handle their identity, a blockchain-based distributed ledger acts as the source for all the IDs in the wallet. The actual identification details aren’t kept on the ledger; they’re stored in a wallet that the user controls. This allows individuals to share different aspects of their identity with various services whenever they choose.
The Purpose
DIDs are all about putting identity control back in the hands of internet users. They let people create unique IDs using trusted systems. With the help of cryptographic proofs like digital signatures, both individuals and organizations can safely exchange data, taking advantage of blockchain’s distributed ledger technology.
The Benefits
In a decentralized setup, users have the freedom to share just the necessary info with any platform, like a website or app. These platforms can check the validity of the information through a blockchain ledger. For example, when signing up for a new online service that requires you to confirm you’re over 18, this framework lets you manage what details from your digital wallet are shared. You can show proof of your age without disclosing your exact birth date.
The Framework
The main DID draft, which was first released by W3C, explains that a Decentralized Identifier is just a straightforward text string. It has three components: the DID URI scheme identifier that’s kept on-chain, the DID method identifier, and the specific identifier for the DID method. DIDs are integrated into a worldwide key-value database, with some blockchains storing the DID Documents (like public keys, service endpoints, and authentication protocols). Essentially, DIDs function as keys while DID Documents serve as values, outlining specific data models to kickstart cryptographically verifiable interactions with the identified entity in the decentralized space.
Conclusion
DIDs are a powerful tool that can transform the way we think about digital identity. By empowering individuals with greater control over their personal data and enabling secure and verifiable interactions, DIDs are paving the way for a more decentralized and privacy-focused future.