Passwordless authentication removes the weakest link in identity systems—passwords. It replaces shared secrets with strong, cryptographic proof. No stored credentials. No phishing bait. No credential stuffing. It shortens attack surfaces and speeds access across applications.
But security does not end with passwordless. Separation of duties is the second control layer. It ensures no single account or role can perform high-risk actions without oversight. By dividing permissions—admin vs. auditor, deployer vs. approver—you prevent malicious or accidental damage. When combined, passwordless authentication and strict separation of duties remove both credential risk and privilege escalation risk.
Implementing this means using identity providers that support passkeys, WebAuthn, and other FIDO2 standards, then mapping roles so no user has end-to-end power. Every privileged operation demands two things: verified identity and independent authorization. The system enforces both automatically.