Digital Identity Glossary | All terms in one table

How to use this page

• Terms are listed alphabetically. The layer column says where a term sits in the ecosystem; the glossary column links to its full definition with practical and legal detail.
• Seven layers organise the whole vocabulary: supply side, wallet, contents, demand side, infrastructure, regulation and AML. Every term belongs to exactly one.
• One term appears in two glossaries by design. PID is defined as a role in part 1 and as a dataset in part 3.

All terms

What each glossary covers

• EUDI Wallet & eIDAS 2.0 Glossary, part 1: who does what in the ecosystem - the demand side. The wallet, PID as a role, relying parties, intermediaries and verifiers: who reads data from a wallet and what infrastructure that takes.
• Part 2: who issues, who provides, who guarantees - the supply side. Issuers, holders, wallet providers, trust service providers and the two tiers of trust service, plus the Article 5f catalog of sectors that must accept the wallet.
• Part 3: what is inside the wallet - the contents. What PID actually contains, the three attestation types and what separates them, and the two mechanisms that shape what leaves the wallet: selective disclosure and combined presentation.
• Part 4: assurance levels and signatures - what gives a credential its legal weight. The three assurance levels for electronic identification, electronic seals and qualified timestamps, and the three tiers of electronic signature, plus what separates the two scales from each other.
• Identity Orchestration Glossary - the infrastructure underneath. Orchestration, the orchestration layer, dynamic routing, fallback, method coverage and eID-native architecture. Not part of the EUDI series: this vocabulary applies wherever more than one verification method is in play.
• AML and KYC Glossary - the vocabulary of customer due diligence under the EU Anti-Money Laundering Regulation (AMLR): obliged entities, the risk-based approach, simplified and enhanced due diligence, politically exposed persons, beneficial owners, sanctions screening, ongoing monitoring, remote identification, AMLA and open banking. Not part of the EUDI series: this vocabulary applies to every obliged entity that identifies and verifies customers.

The glossaries so far.

How the layers fit together

A credential is created on the supply side by an issuer, under guarantees provided by a trust service. It lands in the wallet, where a holder keeps it. Its contents determine what can be proved and how much of it leaves the wallet in any single request. On the demand side, a relying party asks for attributes and verifier infrastructure checks them, either built in-house or operated by an intermediary. Underneath all of it sits the infrastructure layer, which decides which method a given user is routed to and what happens when that method fails. Regulation cuts across the whole picture and determines who has no choice but to take part.

The AML layer describes what obliged entities under the AMLR must do with the result: who has to be identified and verified, how deeply, and which means count for remote identification.

The layers are not a hierarchy. They are a way of asking where a term belongs, which is the fastest route to understanding what it does.

What is not defined here yet

The trust framework in practice, including certification, trusted lists, conformity assessment and cross-border recognition, is not defined here yet and will be added to the EUDI Wallet & eIDAS 2.0 Glossary. Further domain glossaries will follow, on age assurance and identity fraud.

To test your own position against the vocabulary, see the EUDI Wallet Readiness Checklist and Are you ready for July 2027? A 32-question SCA & AMLR readiness checklist.