Overview: Non-Human Identity (NHI)

Quick Definition

A Non-Human Identity is a digital identity assigned to automated systems, applications, services, or devices rather than human users. These identities enable machines, software applications, APIs, service accounts, and IoT devices to authenticate themselves and access resources within digital environments without human intervention.

Non-human identities are fundamental to modern IT infrastructure, encompassing everything from database service accounts and API keys to certificates for web servers and authentication tokens for microservices. They operate continuously, often with elevated privileges, making them attractive targets for cybercriminals who may exploit them to move laterally through networks or escalate privileges.

Managing non-human identities presents unique security challenges. Unlike human identities, they don't follow predictable patterns, may operate 24/7, and often lack the behavioral monitoring that helps detect compromised human accounts. They frequently have longer lifecycles than human credentials and may be embedded in code or configuration files where they're difficult to rotate regularly.

Effective non-human identity management requires automated discovery, regular credential rotation, principle of least privilege enforcement, and specialized monitoring tools that can establish baseline behaviors for automated systems and detect anomalous activity that might indicate compromise.