Research And Implementation Of Security Comnuication Protocol Stack For The WIA-PA Network

WIA-PA network is independently developed by our country and used for industrial monitoring, measurement and control applications. Security technology is one key technology of the industrial wireless network. Make sure security and reliable access to information is the basic need for the data communication in the whole wireless network.Aiming at the concrete features of WIA-PA network, this paper analyzes the security requirements in industrial wireless networks, builds the layered WIA-PA security architecture, and designs the WIA-PA security communication protocol stack. The key management mechanism and the security authentication method for WIA-PA network is proposed in this paper, based on this designed some security communication services in WIA-PA network have been realized. The main content of this thesis includes:1) Research industrial wireless WIA-PA network architecture; introduce the security threats, security principles and security targets in the network; design and construct the WIA-PA security system which is composed of the security manager, security management agent and security management module, and focuse on centralized security management model and security communication between network devices.2) Design and implement WIA-PA network security communication protocol stack. Research the security mechanism in the Data Link Layer (DLL) and the application layer; design and realize the security management module function in the device manager provided the data check, device authentication, data encryption and the other services; build the security management information base which saves the information what each security management entity needs, and to achieve the operation of geting and updating the information through accessing security management information base.3) Design and implement WIA-PA network key management system. Key management is the basis of the WIA-PA network security communication. Research and analyzes the encryption algorithms and key management mechanism in industrial wireless network; build the WIA-PA security key management platform based on the security manager to achieve WIA-PA networks centralized key management.4) Based on the realization of WIA-PA key management system, research the security authorization mechanism; implement the new device security join network and identity authentation of the rejoin device.Through setting up the WIA-PA security functions test system, these security functions and security communication were tested and validated. The test results indicate that the device security join, key management and security services can be better applied in the wireless environment based on security manager; the cryptographic service also has effectively solved the security problem between the interior resources and the data communication in industry wireless network based on the hardware. These greatly and effectively enhanced the security performance of network communication in industry wireless network and laid a solid foundation for more widespread application of industry wireless network.