A Radioisotope Thermoelectric Generator (RTG) is a device that produces electricity by converting heat released from the radioactive decay of isotopes, typically plutonium-238, into electrical energy using thermocouples. RTGs are commonly used in environments where solar power is impractical, such as deep space missions, remote weather stations, and unmanned spacecraft. While not directly a cybersecurity device, RTGs are critical to the operation of many high-value systems, and their security is essential to prevent sabotage or misuse. Protecting RTG-powered infrastructure from cyber threats is an important aspect of overall system security.