中转CPU实现多重冗余系统对外安全通信的方案探讨

针对信号系统安全通信的具体要求,提出了通过中转CPU实现多重冗余系统对外通信的安全架构和实现方法,并通过安全估算证明了该方法的有效性。通过分析Checksum、NISAL、VCP、CRC和MAC等安全编码的特性,建议采用CRC编码作为中转CPU内部数据完整性的安全防护,采用VCP编码作为中转CPU对真实性和时效性的防护和判断。

Study of Using Transfer CPU to Realize External Vital Communication for A System with Multiple Redundancies

According to the requirement of secure communication for signaling system,the security architecture for external communication of a system with multiple redundancies via transfer CPU is proposed along with its realization method.Meanwhile.its security has been estimated to verify the effectiveness of the method.Through analyzing the characteristics of several vital codes such as Checksum ,NISAL,VCP,CRC and MAC,it is recommended that CRC be taken to ensure the integrity of internal data of the transfer CPU while VCP be used as safety coding to protect and judge the authenticity and timeliness of the communication between the transfer CPU and outside systems.