Method for operating a security gateway of a communication system for vehicles

The invention relates to a method for operating a security gateway (1) between data buses (10, 20) of a vehicle, in which a correlation between an identification information item (ID) of the message (N) and a processing rule (VR) is provided by means of a routing matrix (RM) for each message (N) arriving on a data bus (10, 20), characterized in that at least one processing rule (VR) allocated to an identification information item (ID) has a reference information item (POLICY) to a security rule (SR) stored in a memory unit (4), which rule is used for filtering the message (N) having this identification information item (ID) by means of an interpreter (IP). In an alternative solution, the reference information (POLICY) is omitted. 本发明涉及用于操作在车辆的数据总线(10、20)之间的安全网关(1)的方法，其中借助于针对在数据总线(10、20)上到达的每个消息(N)的路由矩阵(RM)来提供在消息(N)的标识信息项(ID)和处理规则(VR)之间的关联，其特征在于：被分配给标识信息项(ID)的至少个处理规则(VR)具有至在存储单元(4)中存储的安全规则(SR)的引用信息项(POLICY)，所述规则用于借助于解释器(IP)来过滤具有这个标识信息项(ID)的消息(N)。在可替代的解决方案中，省略了引用信息(POLICY)。