Material selection is the process of choosing a substance that fits a part’s intended use, load, and environment. In practice, it means balancing strength, heat resistance, flammability, conductivity, weight, cost, and durability so the component works safely where it will be deployed.
In cyber security, material selection matters because hardware security is also physical security. A poorly chosen plastic may deform near heat, burn more easily, or crack under stress, making enclosures, mounts, or device housings easier to defeat. Secure designs may use flame-retardant polymers, metal shielding, tamper-resistant fasteners, or materials that block radio leakage and protect internal electronics. Attackers can exploit weak materials to force entry, cause overheating, or induce failure; defenders reduce that risk by selecting materials that match the threat model and operating environment.