Passwordless authentication removes the user password from the login step, but it does not automatically eliminate all infrastructure secrets. Removing secrets from infrastructure means replacing reusable credentials with short lived, identity bound access for both people and machines. The distinction matters because many environments stop at user login while leaving API keys, tokens, and machine credentials exposed.
What Actually Changes When You Remove the Password
Passwordless authentication changes the sign-in ceremony for a person: instead of proving knowledge of a password, the user proves possession of a stronger authenticator such as a passkey, security key, or device-bound credential. It reduces phishing and password reuse risk at the login step, but it does not by itself redesign how systems authenticate to each other or how privileged back-end access is granted.
That is why passwordless is best understood as an authentication upgrade, not a full secrets-removal programme. The control boundary is the human login flow, so teams can improve user sign-in while still leaving API keys, long-lived tokens, SSH keys, and service credentials untouched elsewhere in the stack.
If you want the broader authentication model, the Authentication Guide covers how people and machines authenticate differently, which is the key distinction many rollouts miss.
What “Removing Secrets from Infrastructure” Is Trying to Achieve
Removing secrets from infrastructure means replacing reusable credentials with short-lived, identity-bound access. In practice, that shifts the design away from static secrets living in code, config files, CI/CD pipelines, environment variables, or shared vault lookups and toward dynamic, auditable access that expires quickly and is tied to a workload or user identity.
This is a broader security transformation than passwordless login. It can affect human access, but it is usually most valuable where machines, services, and automation need to reach cloud resources, APIs, databases, and internal tools without carrying durable secrets. The goal is to reduce blast radius, make stolen material less reusable, and remove hidden dependencies on copied credentials.
For a practical view of that shift, the Secrets Management Guide explains how teams move from secret sprawl toward secretless workload identity and dynamic secrets.
The difference becomes clearer if you compare outcomes. Passwordless may remove the password a user types, but secrets-removal changes whether the environment still depends on bearer tokens, API keys, shared service passwords, or hardcoded credentials for infrastructure access.
Why the Distinction Matters in Real Environments
Many programmes stop after improving user sign-in and call the job done. That leaves a common gap: the front door becomes stronger while the service-to-service paths, automation jobs, and administrative scripts still rely on long-lived secrets. In those environments, an attacker or insider who finds one exposed credential can often reuse it far beyond the original login flow.
The operational value of secrets removal is that it narrows the reuse window and forces access to be mediated by identity, scope, and expiry rather than by a copied string. That makes secret theft less durable, reduces the usefulness of configuration leaks, and improves revocation because access can be cut off at the identity or trust layer rather than by hunting every place a value was copied.
NHIMG’s Guide to the Secret Sprawl Challenge is useful here because it shows how hardcoded credentials and CI/CD exposure keep infrastructure secrets alive long after teams think they have modernised authentication.
When teams want to understand the machine side of this problem, Ultimate Guide to NHIs, Static vs Dynamic Secrets is the right bridge from passwordless thinking to short-lived credentials and lifecycle control.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 addresses the attack and risk surface, while NIST SP 800-63 and NIST SP 800-53 Rev 5 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-63 | Digital Identity Guidelines | Covers phishing-resistant authentication and passkeys for user sign-in. |
| Recommendation — Adopt phishing-resistant authenticators for login and separate that from infrastructure secret handling. | ||
| NIST SP 800-53 Rev 5 | IA-5 — Authenticator Management | Directly addresses lifecycle control for passwords, tokens, keys and other authenticators. |
| IA-9 — Identification and Authentication (Non-Organizational Users) | Fits machine-to-machine or non-user infrastructure access that still relies on authenticators. | |
| Recommendation — Manage credential issuance, rotation and revocation across both people and machine access paths. Use distinct controls for workload and service authentication instead of reusing human-login patterns. | ||
| OWASP Non-Human Identity Top 10 | NHI-02 — Secret Leakage | The question contrasts passwordless login with exposed infrastructure secrets. |
| NHI-07 — Long-Lived Secrets | Short-lived, identity-bound access is the key alternative to reusable infrastructure secrets. | |
| Recommendation — Scan and eliminate exposed secrets in code, pipelines and configuration before relying on passwordless. Replace durable credentials with expiring, scoped secrets or secretless access wherever possible. | ||
Practitioner Guidance
What to verify: Check whether your passwordless rollout only changes the interactive login path. If API keys, service account passwords, SSH keys, or long-lived tokens still exist in workloads and automation, you have improved authentication without removing infrastructure secrets.
Decision rule: Treat passwordless as complete only when the user login flow is stronger and the infrastructure path has moved to short-lived, identity-bound access. If one of those is missing, the environment still carries secret sprawl and residual compromise risk.
What to prioritise: Start with the credentials that can reach production systems, CI/CD pipelines, and administrative interfaces. Those secrets have the highest blast radius and are the most likely to survive a partial modernisation effort.
Practitioner takeaway: Passwordless removes a password from human sign-in; secrets removal removes reusable trust from the wider environment. The security gain is much larger when both happen together, because that is when stolen material becomes both harder to obtain and less reusable.
Related resources from NHI Mgmt Group
- Guide: Passwordless and Passkeys Guide
- How should security teams replace shared secrets with passwordless access in infrastructure environments?
- Why do ephemeral credentials still leave risk in machine access models?
- Why is it crucial to adopt new authentication methods in MCP usage?
- Should organisations rely on passwordless authentication to solve access risk?
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Reviewed and updated by the NHIMG editorial team on October 30, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org