# Overview: Single Sign-On (SSO) / OAuth2 (is this chart correct?)

**URL:** https://meta.discourse.org/t/overview-single-sign-on-sso-oauth2-is-this-chart-correct/90231
**Category:** Self-hosting
**Created:** [6월 19, 2018, 5:00오후 UTC](https://meta.discourse.org/t/overview-single-sign-on-sso-oauth2-is-this-chart-correct/90231 "2018-06-19T17:00:11Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![supermathie](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/supermathie/32/507518_2.png) [@supermathie](https://meta.discourse.org/u/supermathie)
#### Post date: [6월 19, 2018, 5:39오후 UTC](https://meta.discourse.org/t/overview-single-sign-on-sso-oauth2-is-this-chart-correct/90231/2 "2018-06-19T17:39:02Z")

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Yes, that’s pretty much it.

For reference here are exemplar login sequences **without SSO** - note that Discourse has to understand how to interface with each possible backend:

 ![image](https://global.discourse-cdn.com/meta/original/3X/4/c/4c6f513ef8b58ae711c4ba3adc0f13c9ce0b68ef.png)

Here is an example **with SSO** - note that Discourse only communicates with a Single system - whatever happens behind that (username/password, oAuth2, fingerprints, RFID card, blood sample, retinal scanner) is of no concern to Discourse:

 ![image](https://global.discourse-cdn.com/meta/original/3X/d/2/d2ede3d811113496ed47af73bb9002f889809a3e.png)

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