PCI DSS 8.3.1: Authenticate All Users with At Least One Factor
PCI DSS 8.3.1 requires that every user accessing your system components authenticate using at least one authentication factor—something they know, have, or are. This foundational control prevents unauthorized access and is non-negotiable for card data environments. Learn how to implement and maintain compliant authentication across your infrastructure.
What this means
All user access to system components must be authenticated via at least one authentication factor. Authentication factors fall into three categories: something you know (passwords, PINs), something you have (tokens, smart cards, hardware keys), or something you are (biometrics). This control ensures that only legitimate users gain access to systems that process, store, or transmit cardholder data.
How to comply
- 1.Deploy authentication mechanisms for all user accounts accessing system components, including administrative and service accounts
- 2.Choose at least one authentication factor type (knowledge-based, possession-based, or inherence-based) for all user access
- 3.Configure systems to enforce authentication before granting access to cardholder data environments
- 4.Document authentication requirements and methods used across your infrastructure
- 5.Test authentication controls regularly to ensure they function correctly and cannot be bypassed
- 6.Monitor and log all authentication attempts, both successful and failed
Evidence auditors look for
- Authentication system configurations showing enabled login requirements
- User account listings with authentication methods assigned to each account
- Screenshots of login prompts and authentication factor deployment
- System logs showing successful and failed authentication events
- Authentication policy documentation detailing factor requirements
- Reports from identity management systems confirming authentication enforcement
- Audit results from penetration testing validating authentication controls
Frequently asked questions
When will FAQs be available?
The FAQ for this control is currently being prepared.
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