What is a machine ID?

A machine ID, or machine identity, is a digital identity used by a machine, application, service, workload, or automated process to authenticate and access other digital resources. Unlike a user identity, a machine ID does not represent a person. Instead, it represents a technical component that needs to communicate securely with other systems.

Machine IDs can include identities associated with service accounts, API keys, tokens, certificates, secrets, and cloud workloads. These identities are used when systems need to communicate with each other without a user actively signing in.

Machine ID and NHI (non-human identities) are closely related concepts. NHI is a broad term for identities that do not represent humans, while machine ID is commonly used for identities associated with machines, applications, workloads, and automated services. Terminology can vary between vendors and security communities.

A useful analogy is an access badge issued to a robot rather than an employee. The robot needs access to specific areas to perform its tasks, but its access should be limited to what is actually required. Similarly, a machine ID must be identified, protected, and granted appropriate permissions.

Sicra and machine IDs

Machine IDs are becoming increasingly important as organizations adopt more cloud services, APIs, automated processes, DevOps platforms, and AI-powered solutions. Modern environments can contain large numbers of machine identities, and insufficient visibility into these identities can create significant security risks.

If a machine ID has excessive privileges, poorly protected credentials, or remains active after it is no longer required, attackers may be able to use it to access systems and data. Managing machine identities is therefore an important part of modern identity security and Zero Trust.

Sicra helps organizations establish stronger control over identities and access through assessments, modern identity architecture, and Zero Trust principles. This can improve visibility across both human and non-human identities, reduce unnecessary privileges, and secure access between systems and services.

Services

Identity maturity assessment

Zero Trust maturity assessment

Cloud security maturity assessment

Security strategy

CISO-for-hire

Related terms: NHI (non-human identities), IAM (Identity and Access Management), Identity security, Entra ID, Authentication, Authorization, Token, Zero Trust, API (Application Programming Interface), Agentic AI