||In recent years, how to prevent cyber attacks has always been in the field of research. Attackers will hide when they are attacking so that defenders or investigators cannot grasp the attackers behind them. Among them, the security problems of the increment of the Internet of Things (IoT) will come to the forefront. Mirai, a malware attacking IoT devices, and the problem on a network camera with default password issue, harm and leak the privacy of innocent people. The attacks cause harm to the world such as DDoS attacks that affect network bandwidth, email spam, vulnerability mining, user privacy leaks, and etc. These attacks will be more difficult to defend due to the increase in IoT devices. However, the detection and defense of IoT devices are still in its infancy. In this paper, an IoTD method will be proposed from the perspective of spam to detect whether a sender of the mail is an IoT device, and thus effectively use this information in security research field in the future.|
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