A Study Of Embedded Wiresless Video Encryption Transmission System

In recent years,video monitoring has become more and more important in our life.Video monitoring has played a significant role in protecting our personal and property safety,and video monitoring can help us understand the latest development of remote monitoring in real time.Traditional monitoring system needs network cabling,and the transmission process may have security problems.So this system based on embedded ARM platform to achieve a wireless video encryption transmission scheme,this system USES wireless WIFI technology network convenient,avoid the network wiring resource consumption,at the same time to the transmission of the image added encryption algorithm,improve the security performance.The main contents of this thesis are as follows:Firstly,the research background and significance of this subject are analyzed,and the current research status of chaos theory,cryptography and embedded image transmission system is summarized.Finally,the overall design scheme of this system is presented combined with the existing hardware equipment in the laboratory.Secondly,the hardware used in this system is introduced,including video image acquisition module,each main circuit unit module,wireless network communication module.An image encryption algorithm based on chaotic system and DNA is proposed again.Firstly,the original image is segmented and coded,and the sequence values generated by the hyperchaotic system are used to select the original image and the Logistic sequence.In this way,the encrypted image can no longer see any effective features of the original image.Decryption of the encrypted image through the decryption program verifies the effectiveness of the algorithm on the simulation software.Finally,the software design of the system is realized on the embedded ARM processor.The system completes the overall function of the system according to such a process from part to whole.Video acquisition terminal completes image acquisition through V4L2 interface,USES Socket Socket for network transmission and adds encryption function;The program of video receiver realizes the function of image decryption,conversion and display.The video encryption transmission system designed in this paper can not only ensure the real-time transmission of video images,but also the encryption algorithm designed in this paper is highly sensitive to the initial value,and the key space can reach as much as 2265,which can effectively resist all kinds of external attacks.