Most SOCs do not have a detection problem — they have a signal-to-noise problem. Why the tuning loop, not the rule count, decides what gets caught.

A relocked bootloader, a hardware root of trust, and a boot chain you can independently verify — how verified boot actually works and why the discrete secure element matters.

Auditability, failure behaviour, and cryptokey routing: the comparison that matters in practice, grounded in running full-tunnel WireGuard on real infrastructure.

Study notes for Security+ Domain 2 (22% of the exam): threat actors, attack surfaces, vulnerability types, malicious activity, and mitigations.