Designing a trusted client-server distributed network

The client-server distributed network model was analyzed from a security perspective, and an expanded client-server model which includes security-relevant properties was developed. A network-oriented security policy was produced as the next step in developing a trusted client-server network. The various services provided on the distributed network map into NTCB partitions, producing an easily specified system architecture and simplifying the task of resource protection. This approach also allows the NTCB interface to be easily specified, since the interface is defined by the network protocols fused to access the individual services