> ## Documentation Index
> Fetch the complete documentation index at: https://docs-dev-actions-triggers-prototype.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

> Learn about data security related to token and user data storage, Allow Lists and Deny Lists.

# Data Security

* [Auth0 IP Addresses for Allow Lists](/docs/secure/security-guidance/data-security/allowlist) - If your environment is behind a firewall, custom database connections, Actions, Hooks, and Rules may require you to add specific Auth0 IP addresses to the AllowList to ensure proper functionality.
* [Add User Attributes to Deny List](/docs/secure/security-guidance/data-security/denylist) - If there are user fields that should not be stored in Auth0 databases due to privacy reasons, you can add user attributes to the Deny List.
* [User Data Storage](/docs/secure/security-guidance/data-security/user-data-storage) - Learn the differences between using the Auth0 data store and an external database to store user data.
* [Token Storage](/docs/secure/security-guidance/data-security/token-storage) - Learn how and where to store tokens used in token-based authentication.

## Learn more

* [Security Bulletins](/docs/secure/security-guidance/security-bulletins)
* [General Security Tips](/docs/secure/security-guidance/tips)
* [Token Best Practices](/docs/secure/tokens/token-best-practices)
* [Custom Database Connection Security Best Practices](/docs/authenticate/database-connections/custom-db/custom-database-connections-scripts/connection-security)
* [Revoke Access to APIs Using Application Grants](/docs/get-started/applications/revoke-api-access)