SDN-based quantum key distribution Internet of Things publishing and subscribing system

One or more embodiments of the invention provide an SDN-based quantum key distribution Internet of Things publishing and subscribing system. The system comprises four parts, including a sensing layer, a network layer, an SDN control layer and an application layer. According to the system, the function of collecting data information is achieved through the sensing layer, and the data information is transmitted to an event proxy through an edge gateway. The control layer uploads the event information obtained from the event proxy network to the application layer and returns subscription information according to the application layer. The event proxy sends the subscribed event to a subscriber. The control layer encrypts the information of the publish and subscribe service by using the quantum key generated in the network through a key management module. According to the SDN-based quantum key distribution Internet of Things publishing and subscribing system provided by the invention, in an Internet of Things syst