What is Measured Boot?

Measured Boot is a security process that records and verifies the integrity of critical system components during the startup sequence. Instead of simply checking whether components are trusted, Measured Boot creates cryptographic measurements of firmware, bootloaders, drivers, and operating system components as they load. Organizations use Measured Boot to detect unauthorized changes, strengthen platform integrity, and support security monitoring across managed devices.

Why is boot integrity important?

The startup process establishes the foundation for everything that follows. If attackers compromise firmware, bootloaders, or early operating system components, they may gain control before traditional security tools become active.

Organizations focus on boot integrity because it helps:

• Detect unauthorized modifications
• Identify boot-level malware
• Strengthen device trust
• Support secure system startup
• Improve security visibility
• Reduce low-level persistence risks

Protecting the earliest stages of system execution helps create a more trustworthy computing environment.

How does Measured Boot work?

During startup, the system generates cryptographic measurements of key components and records them in a trusted platform module (TPM) or similar secure hardware.

The process typically involves:

These measurements create an auditable record of what was loaded during the boot process.

How is Measured Boot different from Secure Boot?

The two technologies often work together but serve different purposes. Secure Boot focuses on preventing untrusted components from loading. Measured Boot records what actually loads and preserves that information for later verification and analysis.

Key differences include:

• Secure Boot blocks unauthorized code
• Measured Boot records component integrity
• Secure Boot enforces trust decisions
• Measured Boot supports verification and auditing
• Secure Boot prevents execution
• Measured Boot provides evidence of execution
• Together, they help improve platform security and trust.

What threats can Measured Boot help identify?

Attackers sometimes target low-level components because they can operate before security software becomes active. Measuring startup components helps organizations identify unexpected modifications that may indicate compromise.

Security teams commonly use these measurements to investigate:

• Bootkits
• Firmware tampering
• Rootkit activity
• Unauthorized driver modifications
• Platform integrity issues
• Startup configuration changes

This visibility helps organizations detect threats that may otherwise remain hidden.

Why is attestation important?

Recording measurements becomes more valuable when systems can verify those measurements against expected values. This process, often called attestation, helps determine whether a device started in a trusted state.

Benefits of attestation include:

• Device trust verification
• Remote integrity validation
• Stronger access decisions
• Improved compliance monitoring
• Better security visibility
• Enhanced risk assessment

These capabilities support security programs that depend on device trust and integrity.

How Hexnode supports trusted device management

Device trust often depends on secure configurations, compliance enforcement, and visibility into endpoint health. Hexnode helps organizations manage these requirements through compliance policies, certificate management, VPN configuration, access controls, application management, and secure device administration across managed endpoints.

Hexnode helps organizations by:

• Enforcing device compliance requirements
• Maintaining visibility into managed endpoints
• Supporting secure access controls
• Strengthening endpoint governance
• Providing endpoint telemetry and incident context through Hexnode XDR

These capabilities help organizations support broader device integrity and security initiatives.