Research Of Safe Communication Between Temporary Speed Restriction Server For Passenger Dedicated Train Control System Based On3-DES Algorithm

With the development of modern Communication Based Train Control System, CTC managed directly on the temporary speed limit some of the problems exposed, so the temporary speed restriction server's development was put on the agenda, digital Wireless Communication System will be widely used as the platform between TSRS and other equipment. For example, TCC, RBC, CTC and adjacent TSRS.As a specialized application of the integrated dedicated Digital Mobile Communication System for the development of railway, GSM-R is characterized by adapting to rail transport and it has an advantage of mature technology, it will be a wider range of promotion and application. Safety mechanisms of Euroradio (GSM-R) in European Train Control System is very important.This paper through in-depth study norms and standards related to the railway in the field of system security requirements, using triple-DES-related theoretical knowledge and technical methods, and study the function of security communications security.(1) First of all, this paper reviews the background of the temporary speed limit of server applications and describes the overall system functionality and technical problems and analysis of the TSRS communication system of the potential security risks, followed by a discussion of its security. In terms of security, the analysis focused on the Message authentication security layer's mechanisms for secure communications. Then study the layers of security service model, service primitives, services, processes, and layers of security features.(2) According to in-depth analysis of safety layer, it uses of data encryption technology to complete the certification process based on the process of Message Origin Authentication and Peer Entity Authentication.MAC is the process to ensure the integrity of transmission of information safety and authentication in safety protocol, and MAC used to improve the calculation of the DES algorithm, that is,3-DES encryption algorithm. Because VxWorks (a real-time operating system) has superior performance and it's facilitate in developing and debugging, VxWorks has a strong technical support. Finally, the algorithm achieved under VxWorks5.5.Authentication, data encryption and other safety measures ensure the safety between temporary speed restriction server and other devices communication system, to become a reliable, secure transmission channel. This equipment includes TCC, RBC, CTC and the adjacent TSRS.