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Access control modelIntermediate

Attribute-Based Access Control

Attribute-based access control evaluates characteristics of the subject, resource, action, and environment to make a contextual access decision.

What it means

Attributes can include role, department, device state, data sensitivity, location, time, risk, ownership, and requested action. Policies combine these values to support finer decisions than static group membership alone.

Why it matters

ABAC can express modern conditional-access requirements, but only when attributes are trustworthy and policies remain understandable.

Practical focus

  • Define authoritative sources for each attribute
  • Keep policies testable and explainable
  • Handle missing or conflicting attributes safely
  • Monitor decision outcomes and policy changes

Common mistakes

  • Using unreliable attributes as security facts
  • Building policies too complex to review
  • Failing open when required context is missing

Certification relevance

This subject appears in or supports the following certification bodies of knowledge:

CompTIA Security+ISC2 CISSPISC2 CCSP

Authoritative sources