AuthZEN

Rethinking SSO: Centralized User Data Provision and Authorization Processing in Corporate Systems

The article examines Single Sign-On systems not merely as authentication gateways but as architectural hubs for delivering user attributes and executing additional authorization logic. It highlights how SSO can aggregate data from sources like Active Directory, HR systems, and IDM platforms, then deliver it via OIDC claims to downstream applications. The discussion covers the shift from fragmented integrations across dozens of apps to a single trusted enforcement point using standards such as aggregated and distributed claims. It also explores the authorization pipeline where SSO acts as a Policy Enforcement Point querying external Policy Decision Points via the AuthZEN Authorization API 1.0. Practical examples include electronic business cards, role assignment, access routing, and mandatory MFA checks before token issuance. The piece stresses maintaining data ownership with source systems while establishing SSO as the single point of trust for applications.