> For the complete documentation index, see [llms.txt](https://docs.onum.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.onum.com/settings/tenant/authentication.md).

# Authentication

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The default authentication method to access your Tenants in Onum is a combination of email + password. However, admin users can activate the following extra authentication methods:

* [Two-factor authentication](/settings/tenant/authentication/two-factor-authentication.md) - Add an extra layer of security by requiring users to provide additional verification beyond just their credentials. 
* [Single Sign-On (SSO) with SAML](/settings/tenant/authentication/single-sign-on-sso-with-saml.md) - Simplify user authentication using SAML. Users will be redirected to their identity provider to verify their identity, without needing a separate username and password.
* [Single Sign-On (SSO) with OpenID](/settings/tenant/authentication/single-sign-on-sso-with-openid.md) - Simplify user authentication using OpenID Connect. Users will be redirected to their identity provider to verify their identity, without needing a separate username and password.