Reference

Glossary.

Short, honest definitions of the terminology used across the European Digital Identity Wallet pages of this site. Where a term is often confused (like the government-notified EUDI Wallet vs. our browser-based Aloaha Web Wallet), we spell out the distinction.

EUDI Wallet: The government-notified national app operated by an EU Member State per Regulation (EU) 2024/1183 (the eIDAS 2.0 amendment). Each Member State issues its own wallet under the ARF (Architecture and Reference Framework). Aloaha does not operate an EUDI Wallet.
Aloaha Web Wallet: Our browser-based credential holder (PWA). It speaks OpenID4VP, OpenID4VCI and SD-JWT VC and is designed for use cases targeting Level of Assurance Substantial. It is not a government-notified EUDI Wallet.
Verifier / Relying Party: A service that accepts wallet-presented credentials to authenticate a user or verify a specific claim (e.g. an age check). Aloaha ships a self-hosted verifier per tenant.
Issuer: A service that mints Verifiable Credentials and delivers them into a wallet. Aloaha ships an OpenID4VCI issuer for SD-JWT VC.
OpenID4VP (OID4VP): The OpenID for Verifiable Presentations protocol. How wallets present credentials to verifiers. We target OID4VP 1.0 FINAL.
OpenID4VCI: The OpenID for Verifiable Credential Issuance protocol. How issuers push credentials into wallets. We target OpenID4VCI 1.0.
HAIP: High Assurance Interoperability Profile 1.0 Final. A tightened profile of OpenID4VP + OpenID4VCI + SD-JWT VC for high-assurance use cases. Mandates x509_hash for verifier identification and encrypted direct_post.jwt responses by default.
SD-JWT VC: Selective Disclosure JWT Verifiable Credential format. Lets a holder disclose only the specific claims a verifier requests, not the entire credential.
mDoc / ISO 18013-5: Mobile document credential format (originally the mobile driving licence). Cryptographic primitives exist in the Aloaha codebase, but end-to-end mDoc verification is not configured out-of-the-box. An empty mDoc directory returns HTTP 501 mdoc_verify_not_configured.
DCQL: Digital Credentials Query Language. How verifiers request specific claims from a wallet. Our verifier ships DCQL for SD-JWT VC.
PID: Person Identification Data. Given name, family name, birthdate, and related attributes as defined by the ARF PID rulebook.
LOTL: List of Trusted Lists (ETSI TS 119 612). The EU trust anchor for qualified certificates. Our verifier maintains an LOTL cache used during x5c chain validation.
WRPAC: Wallet Relying Party Access Certificate. The EUDI-specific credential a verifier registers so wallets accept its presentation requests.
OpenID Federation 1.0: Trust-discovery framework for federated OpenID entities. Aloaha publishes /.well-known/openid-federation so wallets and downstream relying parties can discover our trust anchor.
European Digital Identity Wallet: The ecosystem defined by Regulation (EU) 2024/1183 and the ARF, in which Member States notify wallet solutions that private-sector relying parties must accept for strong customer authentication from December 2027.