Patent ID: 7607167

Claim:
A secure gateway system, comprising: a Multiple Independent Levels of Security (MILS) router processor for bi-directional routing of a data packet based on a security level extracted from the data packet compared to a security level associated with a software partition within the router processor; the MILS router processor further including an MILS router application, the MILS router application including a Multiple Levels Security (MLS) network interface software partition, a MLS router software partition, a first Multiple Single-Level Security (MSLS) software partition configured to securely interface with a first MSLS network, a second MSLS software partition configured to securely interface with a second MSLS network, a third MSLS software partition configured to securely interface with an unclassified network; and a MILS Real Time Operating System (RTOS) for controlling the bidirectional routing of a data packet; a channel coupled to the MILS router processor and a MLS network, the channel for transferring the data packet between the MLS network and the MILS router processor; and a plurality of network interface units for interfacing between the MILS router processor and a plurality of MSLS networks; wherein the plurality of MSLS networks include the first MSLS network, the second MSLS network and the unclassified network.