# Authentication

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Note that you'll only see this section if you have Owner user permissions. Learn more about permissions in [this article](https://docs.onum.com/administration/global-settings/tenant/users).
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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](https://docs.onum.com/administration/global-settings/tenant/authentication/two-factor-authentication) - Add an extra layer of security by requiring users to provide additional verification beyond just their credentials. 
* [Single Sign-On (SSO) with SAML](https://docs.onum.com/administration/global-settings/tenant/authentication/single-sign-on-sso-with-saml) - 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](https://docs.onum.com/administration/global-settings/tenant/authentication/single-sign-on-sso-with-openid) - 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.