Every time you log into a system, you authenticate with a credential — a username and password, a passkey, an SSO session. Now consider how many times your cloud infrastructure, CI/CD pipeline, monitoring tools, microservices, and AI agents do the same thing — without a person involved. At most enterprises, that number is staggering, and it’s growing faster than most security teams realize.

This is the non-human identity problem. It’s not new, but it’s suddenly urgent — and if you’re trying to understand what NHI actually means and why it keeps showing up in security conversations, this is the guide for you.