# Attribute-based access control (ABAC)

Authorization decisions keyed to attributes (the agent's claims, owner, trust tier, and delegation depth) rather than shared keys or static roles.

Learn more: [Agent Authorization](/content/learn/ai-agent-authorization/index.html)

Part of [the Agent Control Fabric](/content/platform/index.html): Highflame's identity, policy, and enforcement substrate for AI agents.

## Keep exploring the glossary.

[**Authorization** \
Deciding whether a given actor is allowed to take a given action. Distinct from authentication (proving who you are); authorization is what an agent may do.\
Read →](/content/glossary/authorization/index.html) [**Blast radius** \
The set of systems and data a compromised agent or credential could reach. Identity-scoped access shrinks it; cascade revocation contains it.\
Read →](/content/glossary/blast-radius/index.html) [**Breakout controls** \
Runtime controls that keep an agent aligned to its mission: containing, redirecting, or stopping it when it veers off course, before the action lands.\
Read →](/content/glossary/breakout-controls/index.html) [**Cascade revocation** \
Revoking a parent credential instantly invalidates everything it delegated, collapsing the affected delegation tree rather than waiting for tokens to expire.\
Read →](/content/glossary/cascade-revocation/index.html) [**Cedar** \
An open, formally analyzable policy language. Highflame authors authorization policy in Cedar and enforces the same policy at every boundary an agent crosses.\
Read →](/content/glossary/cedar/index.html) [**CIBA** \
Client-Initiated Backchannel Authentication: an out-of-band flow that pauses a sensitive agent action for explicit, attributable human approval.\
Read →](/content/glossary/ciba/index.html)