Design And Implementation Of Video Security Protection Mechanism For IoT

In recent years,with the continuous development of IoT(Internet of Things),web cameras have gradually entered our lives and played an increasingly important role.However,as a commercial product,the webcam has limitations in size and cost.Therefore,it generally does not have enough memory and computing power to run a security software,which makes it vulnerable to network viruses.In addition,as a video capture transmission device,it needs to encrypt the video during transmission to prevent the attacker from intercepting the video information from the network.In order to protect the webcam,this paper constructs a real-time encrypted video transmission IoT system.With the goal of defending against the IoT virus,this article selects Mirai,which has caused great harm,as a specific research goal.After constructing its attack model by studying the source code,this article have reproduced the attack behavior of Mirai in the experimental environment and finally found that Mirai has traffic characteristics and port occupancy characteristics while attacking.Based on these two features,this paper implements a detection system that efficiently scans the LAN and finds the devices that might be infected by Mirai.This paper also implements a protection system based on Mirai's traffic characteristics.The system puts a lot of security protection modules in the ”intermediate device” and hides the webcam's ports from the outside,only allowing intermediate devices to access,so that users or the attacker can only indirectly connect to the webcam through the ”intermediate device”.Finally,by simulating the various attack behaviors of Mirai in the experimental environment again,these two systems were tested.Then this paper have realized a complete defense process of Mirai which contains recurrence,analysis,detection,protection,early warning and effect test.In terms of video encryption transmission,this paper encrypts the video based on H.265.According to the characteristics of the sub-interval division in the H.265 arithmetic coding process,this paper has implemented a encryption scheme based on HM,the H.265 official software.Finally,after the verification,the system can meet the requirement of real-time.