Computer hardware and computer software used in the field of computer networks and gateways for data transfers; Computer hardware; Computer network switches, routers, hubs, bridges, firewalls, repeaters, PC cards, accessory cards, computer chips, processor chips, and computer storage medium; and operational and application software for all the aforesaid goods; Computer middleware for use in secure computer systems development; high-assurance communications middleware programs for high robustness separation of computer network communications and high-assurance control of information flows throughout the computer network; secure high-performance communications software middleware product for connecting distributed software applications and/or computer systems; computer middleware developed for embedded systems, enterprise servers, workstations and global networks, for use in providing off-the-shelf, high-assurance communications security on computer networks and instructional manuals sold as a unit therewith