---
type: concept
title: Single-Sign-On (SSO)
tags: [authentication, user-experience]
related: [shibboleth]
created: 2026-06-30
updated: 2026-06-30
sources: ["output/rz_uni_greifswald_de_dienste_allgemein_shibboleth.md"]
---

# Single-Sign-On (SSO)

**Single-Sign-On (SSO)** is a session management process that allows a user to authenticate once and gain access to multiple independent software systems or service providers without being prompted to log in again.

## Implementation in Shibboleth
At the Universität Greifswald, [[shibboleth]] provides SSO for web-based services. Once a user has authenticated with the URZ, they can switch between different supported service providers seamlessly.

## Limitations
A common counterpart to SSO is **Single-Sign-Out**, which allows a user to terminate all active sessions across all providers simultaneously. The URZ's current Shibboleth implementation does **not** support Single-Sign-Out; users must close their browser or clear cookies to end the session.