Cyber hygiene now depends on NHI and secrets governance

At a glance

What this is: This is a cyber hygiene analysis that argues basic security discipline now has to cover non-human identities, secrets, and access control, not just human users and endpoints.

Why it matters: It matters because IAM, PAM, and NHI programmes increasingly fail or succeed on the same hygiene basics: inventory, least privilege, rotation, logging, and offboarding across both people and machines.

By the numbers:

• Global cybersecurity spending is projected to reach $87 billion by the end of 2024.

👉 Read Entro Security's analysis of cyber hygiene and NHI best practices

Context

Cyber hygiene is the routine discipline that keeps identity, systems, and data from drifting into avoidable exposure. In this article, the core point is that hygiene is no longer only about human accounts and patching. It now has to include non-human identities, service accounts, API keys, secrets, and the access paths those identities rely on.

That matters because many organisations still treat NHI governance as a specialist add-on instead of part of the basic security foundation. Once machine identities hold persistent access, the same hygiene failures that affect human IAM, such as weak access reviews, poor logging, and unmanaged credentials, become a broader identity control problem.

Key questions

Q: How should security teams manage non-human identities as part of cyber hygiene?

A: They should treat service accounts, API keys, tokens, and certificates as first-class identities with owners, scope, review dates, and retirement rules. The goal is not only to store secrets safely, but to prevent standing access from accumulating across applications, pipelines, and integrations. That includes rotation, revocation, logging, and access review tied to the identity lifecycle.

Q: Why do service accounts often create more risk than human users?

A: Service accounts often carry broad permissions, operate without direct human oversight, and persist long after the original need changes. That makes them ideal for legitimate automation but also attractive for attackers when credentials are exposed. The risk comes from standing privilege, weak ownership, and poor offboarding rather than the account type itself.

Q: What do organisations get wrong about secrets management?

A: They often treat secrets management as a vault problem instead of a lifecycle problem. Storing a credential securely does not matter if it is overprivileged, hardcoded, reused, or never rotated. Good practice requires knowing who owns the secret, what it can access, when it expires, and how it will be revoked.

Q: How can teams tell whether cyber hygiene is actually improving?

A: They should look for identity-focused outcomes, not just infrastructure counts. Useful signals include fewer permanent privileged accounts, better rotation discipline, tighter access scope, complete logging for machine identities, and measurable offboarding of stale credentials. If those indicators do not move, the programme is reducing noise more than risk.

Technical breakdown

Why non-human identities change cyber hygiene basics

Non-human identities are machine-issued or machine-used credentials such as service accounts, API keys, tokens, and certificates. They differ from human identities because they are often embedded into applications, used at runtime, and left in place long after the original business need changes. That creates a standing-access problem: the credential keeps working even when nobody is actively supervising it. Hygiene therefore has to cover inventory, ownership, rotation, and offboarding, not just authentication strength. Practical implication: treat NHI inventory and credential lifecycle as part of core hygiene, not as a separate cloud project.

Practical implication: treat NHI inventory and credential lifecycle as part of core hygiene, not as a separate cloud project.

Secrets management and least privilege in machine access

Secrets management is the discipline of storing, distributing, rotating, and retiring credentials so they are not exposed or overused. In machine environments, secrets and permissions often travel together, which means a leaked key can become a persistent access path if it is not scoped tightly. Least privilege matters here because service accounts and application credentials are often granted broad access for convenience, then never revisited. That creates hidden privilege creep across workloads, pipelines, and APIs. Practical implication: minimise the reach of each secret and map every machine credential to a specific owner and use case.

Practical implication: minimise the reach of each secret and map every machine credential to a specific owner and use case.

Why logging and access review must include NHIs

Audit logging and access review are only useful when they cover the identities that actually move data and call systems. If machine identities are omitted, teams can miss abnormal use, stale credentials, and unused but still active access paths. The article’s measurement section points in the right direction by tracking privileged account count, authentication strength, and patch latency, but the same logic applies to service accounts and API keys. Visibility without lifecycle control only tells you the problem exists after exposure has already accumulated. Practical implication: extend review, monitoring, and recertification to machine identities with the same discipline used for human privileged access.

Practical implication: extend review, monitoring, and recertification to machine identities with the same discipline used for human privileged access.

Threat narrative

Attacker objective: The attacker wants durable access through machine credentials that blend into normal service activity and are hard to detect or revoke.

1. Entry begins with unmanaged or overexposed machine credentials such as API keys, service accounts, or hardcoded secrets that are already valid in production systems.
2. Escalation happens when those credentials carry broader permissions than the workload actually needs, letting an attacker move from one system to adjacent services or data stores.
3. Impact follows when the same credential set is reused, unrotated, or insufficiently logged, making it easier to persist, exfiltrate data, or disrupt operations at scale.

Breaches seen in the wild

• Cisco DevHub NHI breach — IntelBroker exploited exposed Cisco credentials, API tokens and keys in DevHub.
• Google Firebase misconfiguration breach — Firebase misconfigurations exposed 19.8M secrets across developer instances.

Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

Cyber hygiene fails when organisations treat non-human identities as an exception rather than the baseline. The article is right to connect hygiene with NHIs, because the real problem is not a lack of tools but a failure to govern the identities that increasingly do the work. When service accounts and API keys are left outside the hygiene model, inventory, rotation, and access control become partial controls. The practitioner implication is that machine identity governance has to sit inside the core security operating model, not beside it.

Standing machine privilege is the quiet failure mode this article exposes. Basic cyber hygiene assumes access can be reviewed, reduced, and retired in a managed lifecycle, but many NHIs are created once and then left to accumulate privilege. That creates a durable attack surface that survives ordinary patching and awareness programmes. The practitioner implication is that access review alone is not enough unless it includes permanent machine accounts and their entitlements.

Secrets sprawl is a governance problem, not just a storage problem. The article correctly ties hygiene to secrets management, but the deeper issue is lifecycle drift across application code, pipelines, and runtime credentials. A secret that is hardcoded, reused, or never rotated is evidence that ownership was never properly defined. The practitioner implication is to measure secrets by accountable lifecycle, not by where they are stored.

Cyber hygiene metrics only help when they are identity-aware across people and machines. Counting patched hosts or anti-malware coverage does not reveal whether machine identities are overprivileged or unowned. The same governance discipline used for human privileged access must extend to service accounts, APIs, and automation credentials. The practitioner implication is to use hygiene metrics as a starting point, then add identity ownership and credential rotation as mandatory controls.

Ultimate Guide to NHIs , Lifecycle Processes for Managing NHIs: The hygiene debate ultimately collapses into lifecycle management. The article’s best practices point to the same control family that governs provisioning, rotation, recertification, and offboarding. Once that lifecycle is weak, every downstream hygiene control becomes a partial fix. The practitioner implication is to align cyber hygiene with the full NHI lifecycle rather than treating credentials as static assets.

From our research:

• 1 in 4 organisations are already investing in dedicated NHI security capabilities, with an additional 60% planning to do so within the next twelve months, according to The State of Non-Human Identity Security.
• Another finding from our research shows that 85% of organisations lack full visibility into third-party vendors connected via OAuth apps, including 38% with no or low visibility and 47% with only partial visibility.
• For a broader lifecycle lens, see Ultimate Guide to NHIs , Lifecycle Processes for Managing NHIs for how provisioning, rotation, and offboarding fit into governance.

What this signals

Secrets sprawl is the real maturity test: organisations that can inventory assets but cannot trace machine credentials through ownership, rotation, and revocation will keep mistaking visibility for control. That is why hygiene programmes need to move from scanning to lifecycle enforcement, especially where service accounts touch production systems.

The policy implication is clear. Identity teams that already manage human privileged access have a ready model for NHIs, but they need to apply it to APIs, automation accounts, and application credentials with the same review cadence and accountability.

For practitioners building the next phase of their programme, the better benchmark is not how many controls exist but whether identity drift is shrinking. If permanent access keeps growing, the hygiene programme is absorbing risk instead of reducing it.

For practitioners

• Inventory machine identities with ownership attached Build and maintain a complete register of service accounts, API keys, tokens, and certificates, and require each one to have a named business and technical owner. Without ownership, rotation and offboarding never happen on time. Use the inventory as the control point for review, not as a passive list.
• Rotate and retire secrets on a defined lifecycle Set rotation and expiry rules for credentials that are embedded in applications, pipelines, and integrations. Prioritise secrets that grant production access, then remove unused credentials and revoke anything without a current purpose. Lifecycle discipline matters more than one-time cleanup.
• Apply least privilege to service accounts and automation paths Review the permissions attached to machine identities and reduce them to the narrowest set needed for the workload. Recheck entitlements after every application change, because machine access often expands silently over time.
• Extend logging and alerting to non-human access patterns Make sure authentication logs, API activity, and privileged actions from service accounts are visible in the same monitoring stack as human access. Alert on unusual time, volume, and destination patterns so machine misuse is visible before it becomes persistent access.
• Tie cyber hygiene metrics to identity control outcomes Track privileged account count, authentication strength, patch latency, and data protection alongside credential ownership, rotation status, and offboarding completion. That makes it clear whether hygiene is reducing identity risk or just measuring infrastructure health.

Key takeaways

• Cyber hygiene is no longer just a human identity and endpoint issue because NHIs now carry a large share of operational access.
• The strongest evidence in this article is that basic controls fail when service accounts, API keys, and secrets are left outside lifecycle governance.
• Practitioners should anchor hygiene programmes in ownership, rotation, least privilege, and logging for both people and machines.

Key terms

• Non-Human Identity: A non-human identity is any digital identity used by software, services, devices, or automation rather than a person. It includes service accounts, API keys, tokens, certificates, and workload identities, all of which can authenticate, authorise, and access systems if not governed tightly.
• Secrets Management: Secrets management is the discipline of protecting credentials across their full lifecycle, from creation and storage to rotation and revocation. It matters because a secret is not secure simply because it is stored in a vault. Its real risk depends on scope, ownership, reuse, and expiry.
• Standing Privilege: Standing privilege is access that remains active all the time instead of being granted only when needed. For non-human identities, it often persists in service accounts and automation credentials, creating a durable attack path if the entitlement is too broad or never reviewed.
• Cyber Hygiene: Cyber hygiene is the routine set of basic practices that keep digital environments from accumulating avoidable risk. In identity programmes, it means maintaining inventory, access control, logging, patching, and lifecycle discipline so that both human and machine identities remain visible and governable.

What's in the full article

Entro Security's full blog covers the operational detail this post intentionally leaves for the source:

• A step-by-step cyber hygiene checklist that maps controls to devices, networks, data, users, and security tooling.
• A practical CIS Controls overview that shows how account management, access control, and service provider management fit together.
• A measurement framework for cyber hygiene that includes asset inventory completeness, anti-malware coverage, and patch timing.
• A detailed breakdown of how Entro positions NHI and secrets management inside day-to-day hygiene operations.

👉 The full Entro Security post covers the cyber hygiene checklist, CIS control mapping, and NHI-specific practices in more detail.

Deepen your knowledge

NHI governance, agentic AI identity, and machine identity security are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are responsible for identity security strategy or governance in your organisation, it is worth exploring.