> For the complete documentation index, see [llms.txt](https://docs.indicio.tech/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.indicio.tech/product/knowledge-center/glossary.md). # Glossary Get clear, concise definitions of key terms in decentralized identity and verifiable credentials with the Indicio Glossary—your go-to resource for understanding the Proven platform and ecosystem. #### **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.