Fuente: Wipo "IOT" The present invention provides a technique wherein various devices in which an Internet of thing (IoT) service is supported are safely and mutually connected by using an IoT security hub connected to an IoT device inside an IoT communication service network to perform a secure connection which is mutually authenticated through safe IoT communication between the devices. An authentication service providing method for IoT security comprises the processes of: transmitting an IoT service request to a gateway node through IoT service related browser execution in a terminal to control the IoT device wherein the IoT communication service is supported by the IoT communication service; identifying whether the terminal to control the IoT device is a normal user or not based on profile information collected from the terminal through the IoT service request, and determining control order generation for controlling the IoT device if the terminal is the normal user; confirming a malignant action type according to the excess of a predetermined interval threshold by monitoring an interval by control order generation period if a control order is generated; and blocking the IoT communication service according to the malignant action type, or attempting reauthentication regarding the corresponding terminal. COPYRIGHT KIPO 2016