Organisations should store information that is confidential, useful, and not naturally represented as a login or payment record. Examples include software license keys, banking details, insurance account data, stock records, and other unstructured notes that must remain encrypted. When that information is stored alongside standard vault items, it becomes easier to govern and less likely to be handled informally.
What belongs in secure notes instead of structured vault fields
Secure notes are the right place for confidential information that needs vault-level protection but does not fit the shape of a password, card, or identity record. The key test is whether the item is still useful when stored as unstructured reference data, rather than as a credential, payment instrument, or person record.
That usually includes software license keys, banking instructions, insurance account details, stock or asset records, recovery references, and other operational notes that teams must keep encrypted and searchable. If the item is not naturally validated, rotated, or authenticated like a standard vault object, forcing it into the wrong entry type usually creates more governance friction than clarity.
Why the entry type matters for governance and retrieval
Placing mixed reference data into secure notes makes the vault behave more like a governed records store and less like an informal repository. Teams can keep sensitive context alongside standard vault items without inventing placeholder fields, and that reduces the temptation to keep the same information in spreadsheets, chat, email, or ad hoc documents.
The practical benefit is classification discipline. Password entries should represent secrets used to authenticate, card entries should represent payment data, and identity entries should represent named people or associated identity records. Everything else that is confidential but not structurally one of those objects belongs in notes so it remains encrypted, visible to the right owners, and easier to review during inventory or offboarding.
For guidance on the broader governance pattern behind this separation, see Ultimate Guide to NHIs and the related State of Non-Human Identity Security, which both emphasise visibility, lifecycle control, and reducing secrets sprawl. For teams handling infrastructure credentials and related records, the Critical Gaps in Machine Identity Management report is a useful companion for thinking about how sensitive information should be organised and governed.
Risk and Threat Considerations
When confidential operational data is stored outside secure notes, it is more likely to drift into unsecured documents, tickets, or messaging tools where access is harder to audit and revoke. The main risk is not just exposure, but governance loss: teams stop knowing where sensitive reference data lives, who can see it, and whether it is still current.
Failure mechanism: Unstructured sensitive data is often copied, forwarded, or pasted into places that were designed for collaboration rather than protection, which increases the chance of accidental disclosure and uncontrolled retention.
Impact: Information such as license keys, banking details, or account references can be exposed, reused improperly, or lost during turnover, making incident response, auditing, and offboarding materially harder.
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 address the attack and risk surface, while CIS Controls v8 and NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 — Secrets and Credential Management | Secure notes often store sensitive non-credential reference data alongside secrets. |
| NHI-03 — Discovery and Inventory | Notes help keep sensitive operational data discoverable and governed in one place. | |
| NHI-09 — Third-Party and Shared Access Risk | Banking and insurance notes may be shared and need tighter governance than informal storage. | |
| Recommendation — Store sensitive reference data in encrypted vault notes when it does not belong in credential fields. Inventory sensitive reference data in the vault instead of scattering it across files and chats. Restrict shared access to vault notes that contain sensitive operational references. | ||
| CIS Controls v8 | 6 — Access Control Management | Sensitive notes need controlled access like other protected data. |
| 3 — Data Protection | Encrypted notes are a data-protection control for sensitive unstructured information. | |
| Recommendation — Limit access to secure notes based on need to know and review it regularly. Protect sensitive unstructured vault notes with encryption and controlled storage. | ||
| NIST CSF 2.0 | PR.AC — Identity Management, Authentication and Access Control | Vault note storage still depends on controlled access to sensitive information. |
| GV.RM — Risk Management Strategy | Choosing note storage over informal channels reduces governance and exposure risk. | |
| Recommendation — Apply access controls so only authorised users can read sensitive vault notes. Classify sensitive reference data so it is stored in the most governable vault object. | ||
Practitioner Guidance
What to verify: Confirm that the item does not belong in a structured password, card, or identity object before placing it in notes. If the field needs rotation, expiry tracking, or identity attributes, treat it as a different vault object rather than a note.
Common mistake: Using secure notes as a catch-all for anything “sensitive” without defining what should never be stored there. That usually leads to messy records, duplicate copies, and weak ownership because the vault stops reflecting the real type of data being protected.
Practitioner takeaway: Secure notes should hold confidential context that needs encryption and governance, but not structured records whose security value depends on being treated as a credential, payment item, or identity object.
Related resources from NHI Mgmt Group
- What are the signs that an identity governance approach is still fragmented rather than truly converged?
- How should healthcare organisations implement identity access so staff can get what they need without slowing care delivery?
- Who should own third-party identity governance in healthcare organisations?
- Why does the UK Data Protection Act require organisations to minimise and secure personal data?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on September 20, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
