Embedded MILS network

A method for transmitting information having different classification levels within an interconnection network includes transmitting a data word having encoded information that indicates a classification level to a processing environment having a classification level. The encoded information is examined to ascertain the indicated classification level. The classification level of the processing environment is verified by comparing it with the indicated classification level, and the data word is delivered to the processing environment upon verification. An interconnection network for transmitting the data words includes a switched fabric topology with serializer/deserializer devices interconnected by router blocks. A node for connecting to the interconnection network includes a network interface module linking the interconnection network and the processing environment. The network interface module examines data words to ascertain their classification level and verifies the classification level of the processing environment. The network interface module delivers the data words to the processing environment upon verification.