---
id: abbreviations
title: Reference guide to EUDI Wallet abbreviations
description: Browse common EUDI Wallet abbreviations and their meanings used across digital identity, verifiable credentials, and wallet documentation.
hide_title: true
sidebar_label: Abbreviations
keywords: [abbreviations, EUDI Wallet, glossary, digital identity, verifiable credentials, eIDAS, OpenID4VC, acronyms, reference]
slug: /abbreviations/
---

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> ```


| Abbr       | Expanded form                                                         |
| :--------- | :-------------------------------------------------------------------- |
| ADA        | Automated Data Agreements                                             |
| ARF        | European Digital Identity Wallet Architecture and Reference Framework |
| CAB        | Conformity Assessment Body                                            |
| CRUD       | Create / Read / Update / Delete                                       |
| DA         | Data Agreement                                                        |
| DCQL       | Digital Credentials Query Language                                    |
| DDA        | Data Disclosure Agreement                                             |
| DGA        | Data Governance Act                                                   |
| DID        | Decentralized Identifier (according to W3C)                           |
| DPIA       | Data Protection Impact Assessment                                     |
| DS         | Data Source                                                           |
| DUS        | Data Using Service                                                    |
| EAA        | Electronic Attestation of Attributes                                  |
| EBWOID     | European Business Wallet Owner Identification                         |
| ECDH       | Elliptic-curve Diffie-Hellman                                         |
| EEA        | European Economic Area                                                |
| eIDAS      | electronic IDentification, Authentication and trust Services          |
| ETSI       | European Telecommunications Standards Institute                       |
| EU         | European Union                                                        |
| EUDI       | European Digital Identity                                             |
| EUDIW      | European Digital Identity Wallet                                      |
| FAQ        | Frequently Asked Questions                                            |
| GDPR       | General Data Protection Regulation                                    |
| HSM        | Hardware Security Module                                              |
| IETF       | Internet Engineering Task Force                                       |
| ISO        | International Organization for Standardization                        |
| JOSE       | JSON Object Signing and Encryption                                    |
| JSON       | JavaScript Object Notation                                            |
| JWE        | JSON Web Encryption                                                   |
| JWK        | JSON Web Key                                                          |
| JWS        | JSON Web Signature                                                    |
| JWT        | JSON Web Token                                                        |
| KA         | Key Attestation                                                       |
| LoA        | Level of Assurance                                                    |
| LoTL       | List of Trusted Lists                                                 |
| LPID       | Legal Person Identification Data                                      |
| MAC        | Message Authentication Code                                           |
| mDL        | Mobile Driving Licence                                                |
| mdoc       | ISO/IEC 18013-5 mobile document                                       |
| OAuth      | Open Authorization                                                    |
| OID4VC     | OpenID for Verifiable Credentials                                     |
| OID4VCI    | OpenID for Verifiable Credentials Issuance                            |
| OID4VP     | OpenID for Verifiable Presentation                                    |
| OP         | OpenID Provider                                                       |
| OpenID4VC  | OpenID for Verifiable Credentials                                     |
| OpenID4VCI | OpenID for Verifiable Credential Issuance                             |
| PID        | Person Identification Data                                            |
| PKI        | Public Key Infrastructure                                             |
| PoP        | Proof of Possession                                                   |
| PuB-EAA    | Electronic Attestation of Attributes issued by a Public Sector Body   |
| QEAA       | Qualified Electronic Attestation of Attributes                        |
| QES        | Qualified Electronic Signatures                                       |
| QTSP       | Qualified Trust Service Provider                                      |
| RP         | Relying Party                                                         |
| SD-JWT     | Selective Disclosure for JWT                                          |
| SD-JWT VC  | SD-JWT-based Verifiable Credentials                                   |
| SDK        | Software Development Kit                                              |
| SE         | Secure Element                                                        |
| SIOP       | Self-issued OpenID Provider                                           |
| SSI        | Self Sovereign Identity                                               |
| TAO        | Trust Anchor Operator                                                 |
| TEE        | Trusted Execution Environment                                         |
| TI         | Trusted Issuer                                                        |
| TLS        | Transport Layer Security                                              |
| ToIP       | Trust over Internet Protocol                                          |
| TS3        | Technical Specification 3 (EUDI Wallet Unit Attestation)              |
| TSP        | Trust Service Provider                                                |
| UC         | Use case                                                              |
| URL        | Uniform Resource Locator                                              |
| VC         | Verifiable Credential                                                 |
| VCI        | Verifiable Credentials Issuance                                       |
| VP         | Verifiable Presentation                                               |
| W3C        | World Wide Web Consortium                                             |
| WIA        | Wallet Instance Attestation                                           |
| WSCA       | Wallet Secure Cryptographic Application                               |
| WSCD       | Wallet Secure Cryptographic Device                                    |
| WUA        | Wallet Unit Attestation                                               |
| ZKP        | Zero-Knowledge Proof                                                  |