Terminology and Concepts

Self-Sovereign Identity (SSI) A user-centric approach to digital identity, allowing individuals and organizations to control their identifiers and credentials without centralized authorities.

Decentralized Identifier (DID) A globally unique identifier resolvable via the EMPE Blockchain. A DID Document includes public keys and endpoints for trust and verification.

Verifiable Credentials (VCs) Cryptographically signed credentials that attest to certain attributes of an entity. VCs follow W3C standards, ensuring integrity and authenticity.

Credential Schema A JSON-based template defining the structure, properties, and required fields of a credential type. Ensures consistency and interoperability.

EMPE Blockchain The ledger where DIDs are anchored, providing a trust layer that wallets and verifiers rely on for DID resolution and verification.

One-Click Deployment Portal A provisioning tool that automates deployment, DID registration, and initial configuration of the Issuer Service.

Targeted Offering vs. Open Offering

• Targeted Offering: Restricted to a specific recipient DID; requires DID ownership proof.

• Open Offering: Accessible to any wallet scanning the offering’s QR code or link; no DID proof required.

Authorization Code Flow (Wallet Flow) A process where the wallet authenticates and proves DID ownership, exchanging authorization codes for access tokens and, ultimately, retrieving the credential.

Revocation List An on-chain, privacy-preserving data structure used to indicate whether a Verifiable Credential has been revoked. Implemented as a compressed bitstring published to the EMPE Blockchain, allowing verifiers to check revocation status without revealing sensitive data. Each credential references a specific index in the list corresponding to its status.