Glossary

This glossary centralizes the terms most frequently used across the APTITUDE RFCs. All definitions are derived from the EUDI submodules pulled into this repository, primarily the Architecture Reference Framework (ARF) Annex 1 and the Commission Implementing Regulations it cites. Use the source links to trace back to the original wording when drafting or reviewing requirements.

Sources

ARF Annex 1 – Definitions: reference/eudi-doc-architecture-and-reference-framework
Attestation Rulebooks Catalog (templates and rulebooks reference the ARF terminology): reference/eudi-doc-attestation-rulebooks-catalog
Standards and Technical Specifications (terminology in the TS series builds on ARF Annex 1): reference/eudi-doc-standards-and-technical-specifications

Roles and actors

Term	Definition	Source
Wallet User	Person who controls a Wallet Unit.	ARF Annex 1, A.3
Wallet Provider	Natural or legal person that provides Wallet Solutions.	ARF Annex 1, A.3
PID Provider	Entity issuing and revoking Person Identification Data (PID) and binding it to a Wallet Unit.	ARF Annex 1, A.3
Attestation Provider	Collective term for QEAA, PuB-EAA, or EAA providers.	ARF Annex 1, A.4
(Wallet-) Relying Party	Natural or legal person intending to rely on Wallet Units for digital interactions.	ARF Annex 1, A.3
Access Certificate Authority	Provider mandated by a Member State to issue wallet-relying party access certificates.	ARF Annex 1, A.3
Holder (W2W)	User presenting attributes from their Wallet Unit to another Wallet Unit.	ARF Annex 1, A.4
Verifier (W2W)	User requesting attributes from another Wallet Unit.	ARF Annex 1, A.4

Wallet components

Term	Definition	Source
Wallet Solution	Combination of software, hardware, services, settings, and configurations, including Wallet Instances, WSCA(s), and WSCD(s).	ARF Annex 1, A.3
Wallet Unit	Unique configuration of a Wallet Solution provided to a Wallet User.	ARF Annex 1, A.3
Wallet Instance	Application installed and configured on a User's device/environment to interact with the Wallet Unit.	ARF Annex 1, A.3
Wallet Secure Cryptographic Application (WSCA)	Application managing critical assets using the functions of a WSCD.	ARF Annex 1, A.3
Wallet Secure Cryptographic Device (WSCD)	Tamper-resistant device providing the secure environment and crypto functions used by a WSCA.	ARF Annex 1, A.3
Wallet Unit Attestation (WUA)	Data object describing Wallet Unit components or enabling their authentication/validation.	ARF Annex 1, A.3
Keystore	Hardware-backed repository for generating, storing, and using non-critical cryptographic assets.	ARF Annex 1, A.4

Credentials and attestations

Term	Definition	Source
Person Identification Data (PID)	Data set that enables the establishment of a person's identity.	ARF Annex 1, A.2
Electronic Attestation of Attributes (EAA)	Electronic attestation that allows attributes to be authenticated.	ARF Annex 1, A.2
Qualified Electronic Attestation of Attributes (QEAA)	EAA issued by a Qualified Trust Service Provider in line with Annex V.	ARF Annex 1, A.2
Attestation	Collective term for QEAA, PuB-EAA, or non-qualified EAA.	ARF Annex 1, A.4
Attestation type	Identifier for a type of attestation, unique within the EUDI Wallet ecosystem.	ARF Annex 1, A.4
Namespace	Specification of attribute identifiers, syntax, and semantics for an attestation.	ARF Annex 1, A.4
Attestation Rulebook	Document describing attestation type, namespaces, and related features.	ARF Annex 1, A.4
Wallet-relying party access certificate	Certificate authenticating and validating a (wallet-) relying party.	ARF Annex 1, A.3
Wallet-relying party registration certificate	Data object indicating the attributes a Relying Party has registered to request.	ARF Annex 1, A.3
Administrative validity period	Dates during which attributes in an attestation remain valid as represented inside it.	ARF Annex 1, A.4
Technical validity period	Metadata dates/times during which the attestation is valid; typically shorter than the administrative period.	ARF Annex 1, A.4
Attestation Revocation List	List-based mechanism for communicating revoked PIDs or attestations.	ARF Annex 1, A.4
Attestation Status List	Mechanism publishing status (valid/invalid) for relevant PIDs or attestations.	ARF Annex 1, A.4
Pseudonym	Data uniquely representing a User without revealing their attributes by itself.	ARF Annex 1, A.4
Selective Disclosure	Capability for a User to present only a subset of attributes from a PID or attestation.	ARF Annex 1, A.4