Why it exists
Stolen credentials are a common way in. Strong identity controls are a foundation for Zero Trust.
How it works
- 1Central directory of users
- 2Single sign-on (SSO) to applications
- 3Multi-factor authentication (MFA)
- 4Role-based access and regular reviews
Real-world example
Employees sign in once with SSO plus phishing-resistant MFA, and leavers lose access to every app when their directory account is disabled.
Common misconceptions
- “Any MFA is equal.” Phishing-resistant methods are stronger than SMS codes.
Benefits
- Fewer passwords
- Faster on/offboarding
Limitations
- Legacy apps may not support SSO
How it differs from related technologies
IAM manages identities; Zero Trust uses identity as one input to every access decision.
Questions a buyer should ask
- Which MFA methods are supported?
- How is access reviewed?
Learning path
beginner
- • Read CISA's MFA guidance
intermediate
- • Learn SSO protocols at a high level
advanced
- • Read NIST SP 800-63