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NHI 101: What Is a Non-Human Identity? Breadcrumb Home Insights Blog NHI 101: What Is a Non-Human Identity? March 16, 2026 When we talk about identity, we still tend to picture people: employees, contractors, partners logging in from laptops. But in most modern organizations, the fastest‑growing identity population isn’t human at all. It’s machines, workloads, applications and automation. These are known as non-human identities (NHIs), and they now outnumber human users in many organizations anywhere from a 50:1 to a 100:1 ratio. What Is an NHI? A NHI is a digital identity assigned to a machine, service, application or automated process. NHIs exist so systems can authenticate, access resources and interact with one another securely. They’re the connective tissue of modern infrastructure. Every API call, background job, deployment pipeline and automation workflow relies on them to function. Common Types of Non-Human Identities NHIs show up across the technology stack, often in ways that are easy to overlook: Service Accounts: Used by applications or background processes to access databases, file systems, and APIs. These accounts often have broad, long‑lived permissions. API Keys and Tokens: Machine‑to‑machine credentials that enable integrations between systems and services. Bots: Automation bots that log into systems and execute repetitive business tasks, frequently with elevated privileges to “get the job done.” CI/CD Pipeline Identities: Build and deployment systems that require access to source code repositories, artifact registries and sometimes production environments. Individually, each identity seems minor. Collectively, they form a sprawling, dynamic identity layer that is rarely managed with the same scrutiny as human access. Learn more about how to scale your identity and access management strategies for modern complexity. Why NHIs Are Uniquely Risky Non-human identities don’t behave like people. They don’t reset their own passwords. They don’t mention when permissions are excessive. They don’t notice when credentials are hard-coded, forgotten or misconfigured. Most importantly, they often have persistent, programmatic access to critical systems, and by design. When an NHI is compromised, the blast radius can be significant. Attackers can use it to move laterally across systems, access sensitive data or gain broad internal visibility without triggering traditional user-based alerts. And because NHIs are expected to behave automatically, malicious activity can blend in as “normal.” Securing Every Identity As organizations accelerate cloud adoption, automation and DevOps practices, NHIs are multiplying faster than most security teams can track. Yet many identity and access strategies still treat them as an afterthought. Understanding what NHIs are, and why they’re different, is the first step. Because securing modern environments doesn’t just mean protecting people anymore, but also protecting the machines that never log off. Discover how Optiv experts can help you get faster time to value and improve your identity security posture. By: Matthew Lally Matthew Lally is an IAM practice manager at Optiv specializing in identity security strategy, privileged access and large‑scale identity transformations. His work increasingly centers on the governance and security implications of non‑human identities in modern cloud and automation‑driven environments. Share: Optiv Security: Secure greatness.® Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly 6,000 companies across every major industry. We partner with organizations to advise, deploy and operate complete cybersecurity programs from strategy and managed security services to risk, integration and technology solutions. With clients at the center of our unmatched ecosystem of people, products, partners and programs, we accelerate business progress like no other company can. At Optiv, we manage cyber risk so you can secure your full potential. For more information, visit www.optiv.com.
Optiv Security: Secure greatness.® Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly 6,000 companies across every major industry. We partner with organizations to advise, deploy and operate complete cybersecurity programs from strategy and managed security services to risk, integration and technology solutions. With clients at the center of our unmatched ecosystem of people, products, partners and programs, we accelerate business progress like no other company can. At Optiv, we manage cyber risk so you can secure your full potential. For more information, visit www.optiv.com.