Design And Implementation Of Secure Access Gateway Based On Beidou Satellite Communication

With the continuous advancement of national power information construction,the scale of power business terminals is growing rapidly,the types of business applications continue to increase,and the scope of communication access continues to expand.At present,the main ways of power communication include GPRS/CDMA,carrier communication and optical fiber communication.However,some areas of our country can not fully realize information acquisition and real-time monitoring because of the remote geographical location and the unsound communication network.The beidou satellite communication technology that have a lot of advantages such as wide coverage,short construction period and low investment cost has been gradually used by the State Grid Corporation of China in areas without public network coverage,as a supplementary mode of communication for business terminal access.The beidou satellite communication technology lacks the mechanism of handshake and validation in application layer and has potential security risks such as information leakage,data tampering and illegal access,which does not meet the requirements of information security in power system.On the basis of studying the status of the beidou satellite navigation system and the access risk of the beidou terminal,this paper combines the existing security access technology,studies and solves the identity authentication and communication security problems of beidou terminal,and designs beidou security communication protocol for beidou satellite communication technology.The process of key exchange and encrypted communication ensures the confidentiality and integrity of communication data between terminal and business system.The secure access gateway based on beidou satellite communication is designed and implemented,which has the functions of identity authentication,key agreement,data encryption and protocol filtering.It can ensure that trusted beidou terminals and legitimate data can enter the intranet,and improve the security of beidou terminal.Finally,the system can meet the security requirements of sensitive data through functional testing.With the vigorous development of the beidou satellite navigation system,beidou satellite communication technology will be widely used in the field of power informatization in China.Therefore,the research and implementation of the system will promote the construction of beidou security access gateway and accelerate the process of national power informatization.