FORTRESS Explained #1:

FORTRESS Explained #1:

What is secure boot?

Secure boot is a foundational security mechanism that verifies the authenticity and integrity of the code executed during device startup.

In practice, it establishes a chain of trust: each stage of the boot process verifies the next one before handing over execution.

This typically starts from a hardware-anchored Root of Trust and extends to firmware, bootloaders, and eventually the operating system.

Why does this matter?

Because the boot phase is one of the most security-critical moments in a system’s lifecycle.

If an attacker can compromise code at startup, they may gain persistent control before higher-layer protections are even active.

In other words, if trust is broken at boot time, everything that follows becomes harder to trust.

This is also why secure boot is an important part of the post-quantum transition: many existing trust mechanisms rely on classical public-key cryptography.

As we prepare for a quantum-resilient future, startup integrity must evolve as well.

That is the challenge addressed by FORTRESS: advancing a PQ/T hybrid secure boot architecture, with a flexible Root of Trust for robust embedded secure systems.