What is Non-Human Identity (NHI)? Definition & Explanation
Non-Human Identities (NHIs) are digital identities used by services, applications, AI agents, scripts, and devices rather than human users — including service accounts, API keys, OAuth tokens, certificates, and Kubernetes service accounts. NHIs now outnumber human identities in most enterprises by 50:1 or more.
In-Depth Explanation
NHIs include cloud IAM service accounts (AWS roles, Azure managed identities, GCP service accounts), API keys for SaaS integrations, OAuth refresh tokens granted to apps, machine-to-machine certificates (mTLS, code signing), Kubernetes service account tokens, CI/CD secrets (GitHub Actions, GitLab Runners, Jenkins), bot accounts, and AI agent identities. Unlike human accounts, NHIs typically lack MFA, are not subject to standard joiner-mover-leaver workflows, are often shared across teams, accumulate excess permissions, and have credentials that rarely rotate. The 2022 Heroku/GitHub OAuth-token breach, the 2024 Snowflake-related breaches, and the Microsoft Storm-0558 incident (stolen signing key) all centered on NHI compromise. Dedicated NHI security platforms (Astrix Security, Token Security, Oasis Security, Aembit, Andromeda Security, Entro, Clutch Security) discover NHIs across cloud and SaaS, map them to owners and dependencies, detect anomalous use, and orchestrate rotation. The category is converging with classic IAM, CIEM, secrets management (HashiCorp Vault, AWS Secrets Manager, CyberArk Conjur), and agentic AI security.
Why It Matters for Security
NHIs now outnumber human identities by 50:1 or more in most enterprises, yet receive a tiny fraction of security investment. Most major recent breaches involved NHI compromise — stolen API keys, leaked GitHub tokens, abused service accounts. Traditional IAM tools were built for humans (with MFA, lifecycle workflows, periodic reviews) and do not handle NHIs effectively. NHI security is one of the fastest-growing categories in cybersecurity for 2025-2026 as agentic AI multiplies the count further.
Related Tools
- CyberArk PAM
Privileged access management leader with AI-driven risk scoring and secrets management.
- Okta IAM
AI-enhanced identity and access management with adaptive MFA and universal directory.
- CyberArk
Privileged access management platform securing credentials, secrets, and privileged sessions across hybrid and cloud environments.
Frequently Asked Questions
What does Non-Human Identity (NHI) mean in cybersecurity?
Non-Human Identities (NHIs) in cybersecurity are digital identities used by services, applications, AI agents, scripts, and devices rather than human users — including service accounts, API keys, OAuth tokens, certificates, and Kubernetes service accounts. NHIs now outnumber human identities by 50:1 or more.
Why is Non-Human Identity (NHI) important?
NHI security matters because NHIs lack MFA, joiner-mover-leaver workflows, and the access reviews that govern human accounts — yet most major recent breaches (Snowflake, Heroku, Storm-0558) centered on NHI compromise. The category is one of the fastest-growing in cybersecurity, especially as agentic AI multiplies NHI counts further.