# Glossary
#### **AnonCreds**
A privacy-preserving credential format that enables selective disclosure, allowing users to share only the information needed without revealing everything on a credential.
#### **Decentralized Ecosystem Governance (DEGov)**
A governance model—based on a DIF standard—that defines machine-readable rules and policies for credential ecosystems, allowing systems to self-update without third-party arbitration; supported by Indicio Proven's “Governance Wizard.”
#### **Digital Travel Credential**
An ICAO-standardized digital representation of a traveler’s passport that can be securely stored and presented via a mobile device.
#### **Digital Wallet**
An application that stores, manages, and presents verifiable credentials securely, typically installed on a mobile device.
#### **DIDComm**
A secure messaging protocol that allows identity agents (wallets, issuers, verifiers, mediators) to communicate directly and privately using DIDs.
#### **Distributed Ledger**
A decentralized database maintained by a network of nodes, ensuring transparency, immutability, and shared control over data.
#### **Distributed Ledger Network**
A professionally managed network of distributed ledgers, such as the Indicio Network, used for anchoring credentials and public identifiers (DIDs).
#### **eIDAS**
An EU regulation that governs electronic identification and trust services, enabling cross-border digital identity recognition across member states.
#### **eUDI (European Unique Digital Identity)**
A standardized digital identity framework under eIDAS 2.0 that includes support for verifiable credentials and wallet-based identity.
#### **Holder**
The individual or organization that receives, controls, and presents verifiable credentials using a secure wallet.
#### **Holdr+**
A robust and scalable mobile wallet developed by Indicio to enable secure credential storage, messaging, and presentation in decentralized systems.
#### **Hyperledger Indy**
An open-source, purpose-built distributed ledger designed for decentralized identity, enabling secure, privacy-respecting credential exchange.
#### **Issuer**
The trusted party or organization that creates and issues verifiable credentials to users (Holders).
#### **JSON-LD (JavaScript Object Notation for Linked Data)**
A machine-readable data format used for expressing credentials and DIDs in a structured, interoperable way.
#### **Mediator**
A service that supports mobile wallets in maintaining secure communication with issuers and verifiers when the wallet is offline or intermittently connected.
#### **Mobile Driver’s Licence (mDL)**
A digital version of a government-issued driver's license that can be presented and verified securely using a mobile device.
#### **Open Badges**
Digital credentials designed for education and training that use open standards to verify achievements and skills.
#### **Open Source**
Software with publicly available source code, allowing anyone to inspect, modify, and contribute to its development.
#### **Open Standards**
Publicly available specifications (like W3C or DIF standards) that ensure interoperability and avoid vendor lock-in.
#### **OpenID**
A widely adopted authentication protocol that enables users to log in and share identity information securely across services.
#### **OpenID4VCI (OpenID for Verifiable Credential Issuance)**
A protocol that standardizes how verifiable credentials are issued using OpenID flows.
#### **OpenID4VP (OpenID for Verifiable Presentations)**
A protocol for presenting verifiable credentials in a secure, privacy-respecting way using OpenID-based interactions.
#### **Protocol**
A set of technical rules that govern how data is transmitted and understood between systems—such as how credentials are issued, verified, or messaged.
#### **SD-JWT (Selective Disclosure JSON Web Token)**
A credential format that enables selective disclosure and cryptographic privacy using JWT technology.
#### **Verifiable Credential Schema**
A flexible, reusable template that defines the structure and data fields for a specific type of verifiable credential.
#### **Verifier**
The party or system that checks the authenticity and integrity of a presented credential using established trust frameworks and cryptographic proofs.
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