Post-Quantum Secure Boot: Protecting the Chain of Trust with ML-DSA
PosQuantum's Firmware Shield adds ML-DSA verification to every boot stage. TPM 2.0 re-wrap, firmware signing and supply chain attestation — all quantum-safe.
The boot chain is the foundation of all system security. If an attacker compromises the bootloader or kernel, no upper layer — not antivirus, not firewalls — can save the device. Today, this chain relies on RSA and elliptic curves. Both will be vulnerable to quantum computers.
PosQuantum's Firmware Shield replaces RSA signatures with ML-DSA-65 (FIPS 204) at every boot stage: ROM → Bootloader → Kernel → User Space. Each stage cryptographically verifies the next before handing off control.
For devices with TPM 2.0, Firmware Shield re-wraps storage keys in ML-KEM-768. This means post-quantum protection without replacing hardware — the TPM continues to function normally, but keys are now encapsulated with quantum-safe algorithms.
Over-the-air (OTA) updates are protected with dual verification: ML-DSA for signing + SHA-3 for integrity. If an update fails verification, the system automatically rolls back to the last known safe version.
Firmware Shield is the natural companion to Drive Guard: while Drive Guard protects data at rest on disks, Firmware Shield protects the chain of trust that boots the system. Together, they form a complete defense in depth.