Auth0
Auth0 (by Okta) is a cloud-based identity and authentication platform providing login, registration, MFA, social login, single sign-on (SSO), and machine-to-machine authentication for applications. It processes personal data essential to authentication: email addresses, password hashes, login history, and session tokens. The legal basis is contract performance: authentication is a necessary part of the service. An EU deployment region (Frankfurt) eliminates US data transfers for organisations with strict data residency requirements.
What does Auth0 do?
What is Auth0?
Auth0 (acquired by Okta in 2021) is a cloud-based customer identity and access management (CIAM) platform. It provides authentication flows (username/password, social login, passwordless), authorisation (RBAC, custom rules), MFA, anomaly detection, and single sign-on. Developers integrate Auth0 into applications using SDKs, and users are redirected to Auth0's hosted login page or use Auth0's embedded login. Auth0 handles the complexity of secure authentication so application developers don't have to build it themselves.
What personal data does Auth0 process?
Auth0 processes: email addresses (or phone for SMS passwordless), hashed passwords, login timestamps, IP addresses (for anomaly detection), user agent, social profile data (when social login is used), user metadata stored by the application, and session tokens. The privacy principle of data minimisation requires storing only what authentication requires. Avoid enriching Auth0 user profiles with non-authentication data.
Legal basis: contract performance
Authentication is necessary to provide the service: users cannot access their account without it. Contract performance (Art. 6(1)(b)) is the appropriate legal basis. No separate consent is needed for authentication data processing. The privacy notice should describe Auth0 as an authentication processor and list the data categories processed.
EU deployment region
Auth0 provides an EU deployment region (Frankfurt, AWS eu-central-1) for customers who select it. When configured, all user data and authentication processing stays within the EU, eliminating SCCs for primary data flows. Select the EU region when creating your Auth0 tenant if EU data residency is required.
Practical compliance steps
Sign the Okta/Auth0 DPA. Select EU deployment region if required. Implement user data deletion hooks for erasure requests: Auth0 provides management API endpoints for user deletion. Minimise user metadata stored in Auth0 profiles. Disclose Auth0 as an authentication processor in your privacy policy. Enable anomaly detection and log retention configured to minimum necessary.
Auth0 and the GDPR
- Legal basis
- Contract performance (Art. 6(1)(b)) for authentication and identity management as a core part of the service relationship. Auth0 processes the minimum personal data necessary to authenticate users (email, password hash, session token). No consent required for core authentication.
- Risk level
- medium
- Applicable regulations
- GDPR, SCCs for US deployments. Auth0 EU region eliminates SCCs for EU-deployed tenants.
Impact assessment (DPIA)
A DPIA is recommended for Auth0 deployments with large user bases combining authentication with extensive user profiling, social login (which shares social platform data), or where authentication data is linked to sensitive processing downstream.
Sample text for your banner
Your account is secured using Auth0 authentication services. Auth0 processes your email address and authentication credentials to verify your identity when you log in. This is necessary to provide you with secure access to your account.
What Auth0 sets and contacts
- Tracking method
- Identity and authentication platform, login flows, JWT tokens, session management, MFA, social login, machine-to-machine tokens
- Server location
- United States with EU deployment region option (Frankfurt)
- Data transferred outside the EU
- Auth0 (acquired by Okta) is a US-based identity platform. An EU deployment region (Frankfurt) is available for customers who require EU data residency. Standard deployments process authentication data on US infrastructure requiring SCCs. Auth0/Okta provides a GDPR-compliant DPA.
Cookies set (1)
| Name | Type | Duration | Purpose |
|---|---|---|---|
| auth0 | persistent | 7 days | Auth0 session cookie maintaining the authenticated user session across page loads |
Third-party domains contacted (3)
auth0.comcdn.auth0.comeu.auth0.com
Frequently asked questions about Auth0
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What legal basis applies to Auth0 authentication?
Contract performance (Art. 6(1)(b)). Authentication is necessary to provide access to the service: users cannot use their account without it. No separate consent is required for core authentication processing.
Does Auth0 offer an EU deployment region?
Yes. Auth0 provides an EU tenant region (Frankfurt, AWS eu-central-1). Select this when creating your Auth0 tenant. When configured, all user data and authentication processing stays within the EU, eliminating SCCs for primary data flows.
What personal data does Auth0 store?
Auth0 stores: email address (or phone for passwordless), password hash, login timestamps, IP addresses, user agent, social profile data (if social login is used), and any user metadata the application adds to the profile. Minimise stored attributes to what authentication requires.
How do I handle GDPR erasure requests for Auth0 users?
Use the Auth0 Management API DELETE /api/v2/users/{id} endpoint to delete a user. This removes the user profile, credentials, and metadata. For complete erasure, also delete associated logs via the Auth0 Logs API. Respond within 30 days.
Does Auth0 social login (Google, Facebook) create GDPR complications?
Yes. Social login shares data from the social provider to Auth0: name, email, profile picture, social ID. This constitutes personal data transfer from the social provider. Disclose social login providers in your privacy policy. The social provider's own terms govern their data processing.
Do I need a DPA with Auth0/Okta?
Yes. Sign the Okta Data Processing Agreement (which covers Auth0 as an Okta product). Available from Okta's legal documentation. For EU-region tenants, verify the DPA covers your specific deployment configuration.
How long does Auth0 retain login logs?
Auth0 retains logs for 2 days (free), 7 days (Developer Pro), or 30 days (Enterprise) by default. Configure log streaming to export logs to your own storage for longer retention if needed for audit purposes. Delete logs when no longer needed for security or compliance purposes.
Is Auth0 GDPR compliant?
Yes. Auth0/Okta is GDPR compliant with a DPA, EU deployment region option, data subject rights APIs, and SOC2/ISO27001 certifications. EU-region tenants eliminate US transfer concerns. Okta is also certified under the EU-US Data Privacy Framework.
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