Authentication manager system of sensor node having subscription function and method for operating the system

PURPOSE: A system with an authentication management and subscription function for a sensor node and an operating method thereof are provided to prevent the indiscriminate access of another user terminals by transmitting data, which is delivered from a relaying server, to a user terminal. CONSTITUTION: A sensor node(100) collects data using a sensor. A user terminal(300) receives the data from the sensor node based on a subscription request. A relaying server(200) performs authority authentication according to the subscription request of the user terminal. The relaying server determines the service availability of a corresponding sensor node. The relaying server supports data transmitting and receiving between the sensor node and the user terminal by transferring a corresponding result to the user terminal and the sensor node respectively. The sensor node maintains only the connection data with the relaying server in data transmission.