A Security Communication Device Based on Narrowband Internet of Things

According to the narrow-band internet of thing (NB-IoT) communication transmission system and encryption requirements of communication in the field of Internet of Things, a security communication device based on NB-IoT is introduced. The security communication device comprises: a internet of things (IoT) platform and a key management distribution platform connected to the IoT device through the NB-IoT communication module, and the secret key management distribution platform is also connected to the IoT platform. It enables existing IoT devices and IoT platforms that do not have security communication functions to securely connect to the Internet.