Information Security Architecture Design of CBTC System

In existing Communication Based Train Control (CBTC) system, information security threats are analyzed, then information security demands of CBTC system are put forward. To protect information security, three security domains are divided according the Safety Integrity Level (SIL)) of CBTC system. Information security architecture of CBTC system is designed, special use firewalls and intrusion detection system are adopted. Through this CBTC system security are enhanced and operation safety is ensured.