A controlled system for storing credentials, secrets, and other sensitive access material in one managed place. It supports policy enforcement, auditing, rotation, and revocation, giving security teams a way to govern access instead of leaving credentials scattered across browsers and local devices.
Expanded Definition
A centralized vault is more than a storage repository for credentials, API keys, certificates, and tokens. In NHI operations, it functions as the control point where access policy, secret lifecycle, auditability, and emergency revocation are managed together. That distinction matters because the term is often used loosely to describe any secrets store, while a true centralized vault implies governance, not just consolidation.
Definitions vary across vendors, but the security expectation is consistent: sensitive access material should be issued, retrieved, rotated, and retired through a managed system rather than copied into applications, wikis, browser profiles, or local files. That approach aligns with the control intent in NIST SP 800-53 Rev 5 Security and Privacy Controls, especially where access enforcement and audit evidence are required. It also helps distinguish centralized vaulting from static secret storage, which is covered in Ultimate Guide to NHIs — Static vs Dynamic Secrets.
The most common misapplication is treating a shared password repository or cloud secret store as a vault when applications still export copies of the same credentials into code pipelines and support tools.
Examples and Use Cases
Implementing a centralized vault rigorously often introduces integration friction, requiring organisations to weigh stronger governance and traceability against application refactoring, onboarding effort, and operational dependency on the vault service.
- A platform team stores database passwords in a vault and issues them just in time to workloads, reducing long-lived exposure while preserving service continuity.
- An engineering group migrates hard-coded API keys out of source repositories and into a managed secret store, using rotation policies to reduce the blast radius of compromise.
- A security team uses vault audit logs to confirm which agent or service account retrieved a certificate before a production deployment, creating defensible evidence for investigations and reviews.
- An organisation consolidates scattered secrets from CI/CD tools, admin laptops, and chat exports after using the Guide to the Secret Sprawl Challenge as a remediation reference.
- A cloud operations team separates static secrets from ephemeral credentials, then applies tighter rotation to the static set while moving high-risk workflows toward dynamic issuance.
In practice, a centralized vault only works when applications stop bypassing it. The vault becomes the control plane for secrets retrieval, but the surrounding systems still need disciplined identity binding, logging, and rotation logic.
Why It Matters in NHI Security
Centralized vaulting is foundational to NHI security because non-human identities often outnumber human users and generate a much larger secret surface. When credentials are dispersed, security teams lose the ability to answer basic questions about who can use a token, where it is stored, and whether it has been rotated. NHIMG research shows that 88% of security professionals are concerned about secrets sprawl, which reflects how quickly unmanaged distribution undermines control. Centralization helps reduce that sprawl, but only if the vault itself is governed as a high-value trust anchor rather than just another application dependency.
It also supports faster containment. The difference between a managed rotation path and manual cleanup can determine whether a compromised token is neutralized in hours or remains usable across multiple systems. For that reason, centralized vault design should be paired with strong policy, monitoring, and explicit revocation procedures consistent with NIST SP 800-53 Rev 5 Security and Privacy Controls. Organisational maturity on this term often becomes visible only after a leaked secret is detected, at which point centralized vaulting becomes operationally unavoidable to contain the spread.
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 and OWASP Agentic AI Top 10 address the attack and risk surface, while NIST CSF 2.0, NIST Zero Trust (SP 800-207) and NIST SP 800-63 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-02 | Centralized vaults address secret sprawl and poor secret lifecycle handling. |
| NIST CSF 2.0 | PR.AC-1 | Vaults support controlled access to credentials and auditable entitlement enforcement. |
| NIST Zero Trust (SP 800-207) | SC | Zero Trust expects explicit verification before any secret is issued or used. |
| NIST SP 800-63 | AAL2 | Vault access often depends on strong authentication for privileged operators and automation. |
| OWASP Agentic AI Top 10 | A2 | Agentic systems must not bypass centralized secret controls when invoking tools. |
Store secrets centrally, rotate them routinely, and prevent uncontrolled duplication across systems.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on August 26, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
