An instruction label is the printed or displayed guidance that tells a user how a product or system should be used. In cyber security, labels matter because they communicate constraints, warnings, and safe handling rules that help prevent misuse. A device may include a label about default passwords, firmware updates, port limits, data retention, or required power and media types.
These labels are part of the human layer of defense. Attackers may ignore them, exploit the assumptions behind them, or replace them with fake stickers, prompts, or documentation to steer users toward unsafe actions. Defenders use clear labels and warnings to reduce errors, support secure configuration, and make unusual conditions obvious. A good instruction label is specific, easy to notice, and tied to the exact product in use, so it can beat a generic shortcut when the two conflict.