Jiobit burns away part of the circuit board used for physical software programming. If you were to physically open up the Jiobit device, it cannot be programmed or modified— unlike other devices like your phone, your PC, smart home devices, security cameras, or routers.
Additionally, Jiobit circuit boards contain proprietary tamper-resistant features to further deter the most sophisticated hardware hackers. Jiobit does not expose any data ports that can be used for external data communications or software programming.