DRC stands for Design Rule Check. In PCB and hardware design, it is an automated validation step that compares a board layout against manufacturing and electrical constraints such as trace width, spacing, annular rings, clearances, and layer rules. If the layout violates those rules, the checker flags it before fabrication.
DRC matters in security because a board that passes casual visual review may still be unbuildable or unreliable. In real workflows, defenders use DRC to catch accidental misroutes, bad footprint choices, and inconsistent board settings before a design is sent to a fab. Attackers or careless tools can also create risk by introducing subtle violations, hidden changes, or incorrect constraints that survive a superficial review. Running DRC, alongside human inspection, helps preserve design integrity and reduces the chance that a compromised or AI-generated layout reaches production with dangerous errors.