Federal Authentication Service (FAS) — documentation, agreements, levels of assurance

In Belgium

Situation checked in the corpus as at 31-10-2026.

The FPS BOSA page on the Federal Authentication Service (FAS), updated on 29 October 2026, presents this service and the steps for using it FPS BOSA — service page, Federal Authentication Service (FAS) (the page exists in French and Dutch in the corpus):

In other words, the FAS makes it possible to authenticate end users so that they can access secure public applications online. Without prejudice to the obligations under Regulation 910/2014, the law of 18 July 2017 entrusts the FPS Policy and Support (FPS BOSA) with offering electronic identification services for public applications within the authentication service Art. 9(1).

In Belgium

Situation checked in the corpus as at 31-10-2026.

According to the page, the FAS is aimed at public services and institutions that want a secure authentication process for their online services: federal public services, communities and regions, provinces, municipalities and CPAS (public social welfare centres), social protection or social security authorities and healthcare actors, and companies or persons entrusted with a task for the administration or in the public interest FPS BOSA — service page, Federal Authentication Service (FAS).

In Belgium

Situation checked in the corpus as at 31-10-2026.

According to FPS BOSA:

• Authentication methods, cited as examples: username, password and security code; itsme; electronic identity card with PIN code FPS BOSA — service page, Federal Authentication Service (FAS).
• Attributes of the user, retrieved from reliable sources of other public institutions (National Register, CBSS, CBE), are sent to the application requesting them FPS BOSA — service page, Federal Authentication Service (FAS).
• Four steps for an administration: application form and acceptance of the general terms and conditions; configuration according to the integration guides for the SAML 2 or OIDC protocols, and onboarding document; tests in the integration environment; connection to production, after signing the user agreement and passing the tests FPS BOSA — service page, Federal Authentication Service (FAS).
• Technical documents to download, including a FAS Assurance Framework (February 2026) and a technical note on levels of assurance (June 2025) FPS BOSA — service page, Federal Authentication Service (FAS). Both documents are in the corpus and summarised separately: the FAS assurance framework, version 1.6 of 19 February 2026 FPS BOSA — FAS Assurance Framework v1.6, § 1.2. DOCUMENT HISTORY, and the note listing, for relying parties, levels numbered from 100 to 500 to be configured FPS BOSA — Levels of Assurance, technical information, These modifications must be made by the relying party in order to work with levels:.

Two notified Belgian electronic identification schemes bear the name of the FAS, both at assurance level high: in the French version of the list, “FAS / Cartes d’identité électroniques” and “FAS / itsme®”; in the English version, “Belgian eID scheme FAS/ eCards” and “Belgian eID Scheme FAS / itsme®” OJ C/2026/4428 (CELEX 52026XC04428). The page does not mention MyGov.be, which the FPS presents elsewhere as an authentication key FPS BOSA — news item of 05-02-2026, L'application MyGov.be comme clé numérique : tout ce que vous devez savoir !; its list of methods is given only as examples FPS BOSA — service page, Federal Authentication Service (FAS). The history of the FAS assurance framework states “Added MyGov.be” for its version 1.5 of 21 February 2025 FPS BOSA — FAS Assurance Framework v1.6, § 1.2. DOCUMENT HISTORY.