| With modern communication technology upgrading, Information security technology is developing rapidly. The chaotic secure communication technology has its special advantages that makes it has a very wide range of applications. It is also the reason that more and more people concerned about chaotic secure communication technologies. As we all know, Image contains a lot of information especially in real-time video image transmission. How to transmit and process the image data effectively is a core field of application.This paper, by analyzing and researching deeply with several chaotic synchronization theories, finally selects the encryption and decryption method base on Driver-Response synchronization theory. This paper designs a video transmission system of wireless net based on embedded technology and chaotic secure communication technology. In this video transmission system, including a wireless router, the net device is divided three-part. First part is using a wireless router to build a wireless LAN. The second part is the server, it responsible for collecting the encrypted image data of the location, and sending the image data via the wireless module. The remaining part is the client device, The main task of client device is responsible for receiving image data, decrypting processing and displaying. In this paper, encryption and decryption are based on a discrete time chaotic sequence. System is using Drive-Responsive synchronization method to encrypt and decrypt for real-time video data. Finally chaotic video security communications is implemented by WIFI transmission network.This paper includes the following sections:1. A detailed introduction about development history of chaos theory and video translation technology is described. And then analyze the encryption and decryption theory in chaos especially in actual application for today’s trend of social development. 2. Synchronous control theory is introduced. Using Drive-Responsive synchronization method for real-time video data encryption and decryption. This paper selects a chaotic system to iteration. System trajectory will enter chaotic state after more than1000iterations. If system occurs delaying or data losing when transmitting, it would be lead to system loss synchronization. But the system can heal synchronization through Drive-Responsive synchronization method in a very short period.3. Some operations and settings of Ubuntu system having simple operation interface are introduced. Burning embedded system of Linux after cross-compilation into development board. This paper analyzes and designs the technology and develop platform. It also designs a video transmission system that based on embedded technology and chaotic secure communication, and selects S3C6410that base on ARM hardware platform which meets the requirements of the system and has a suitable cost. Simultaneously, shows the detail introducing of all kinds of resource that used in the hardware development.4. This paper introduces the design and implement of the entire chaotic video secure communication system. Firstly, in the software, It describes the processes of constructing a sequence encrypted stream, chaotic encryption and chaotic decryption in detail. Paper gives the system flow chart and the realization code of each module; Secondly, It designs the consisting of each module in hardware systems, and then gives the design process. Finally, it gives the contrast and analysis of ultimate realization. |
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