A desiccant is a substance used to induce or maintain dryness in its surrounding environment by absorbing moisture from the air. In cybersecurity, desiccants are important for protecting sensitive electronic equipment, data storage devices, and network hardware from humidity, which can cause corrosion, short circuits, or data loss. Common desiccants include silica gel, activated alumina, and calcium chloride. These materials are often found in small packets within packaging for electronics or server rooms. By controlling moisture, desiccants help ensure the longevity and reliability of critical cybersecurity infrastructure and prevent environmental damage that could compromise data integrity.