Tools / Zero Trust Architecture (ZTA) Interview questions
What is multi-factor authentication's role in Zero Trust?
Multi-factor authentication raises the assurance level of an identity claim beyond a password alone, making stolen credentials far less useful to an attacker. In Zero Trust, MFA is one of several inputs the policy engine considers, not the entire trust decision by itself.
Phishing-resistant factors such as FIDO2 or WebAuthn hardware keys are generally preferred over SMS or one-time codes, since those weaker factors can themselves be intercepted or socially engineered.
MFA results are combined with device posture and behavioral signals; a successful MFA challenge from an unfamiliar device or location can still trigger additional scrutiny rather than automatic full access.
In a Zero Trust decision, MFA results are:
Phishing-resistant MFA factors are generally preferred because:
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