Abstract: Protocols and architecture for secure virtual private networks. Intraenterprise data communications are supported in a secure manner over the Internet or other public network space with the implementation of secure virtual private networks. Members of a virtual private network group exchange data that may be compressed, encrypted and authenticated, if the exchange is between members of the group.

Abstract: Protocols and architecture for secure virtual private networks. Intraenterprise data communications are supported in a secure manner over the Internet or other public network space with the implementation of secure virtual private networks. Members of a virtual private network group exchange data that may be compressed, encrypted and authenticated, if the exchange is between members of the group.

Abstract: A combined defense and navigational system on a naval vessel is disclosed. The disclosed system includes a track-while-scan pulse radar which is controlled to provide either navigational information or tracking information on selected targets. Additionally, the disclosed system includes a plurality of guided missiles, each of which may be vertically launched and directed toward intercept of a selected target either by commands from the track-while-scan radar or from an active guidance system in each such missile. The invention herein described was made in the course of or under a contract or subcontract thereunder, with the Department of Defense.

Abstract: The present invention provides a method and an apparatus for establishing a virtual private network that operates over a public data network. One embodiment of the present invention includes a system that selects a plurality of entities coupled to the public data network to include in the virtual private network. The system next assembles a plurality of identifiers for the plurality of entities. These identifiers are used to identify communications between the plurality of entities, so that these communications can be transferred securely over the public data network. A variation on this embodiment includes defining encryption, authentication and compression parameters for the virtual private network. In another variation, selecting the plurality of entities includes, assembling entities coupled to the public data network into groups, and selecting groups of entities to include in the virtual private network.

Abstract: Protocols and architecture for secure virtual private networks. Intraenterprise data communications are supported in a secure manner over the Internet or other public network space with the implementation of secure virtual private networks. Members of a virtual private network group exchange data that may be compressed, encrypted and authenticated, if the exchange is between members of the group.

Abstract: One embodiment of the present invention provides a computer system with a plurality of storage memories, each storage memory storing an operating system program, and an identifier for identifying a storage memory containing an operating system program to be loaded when the unit is booted. The identifier is selectively switchable between storage memories so that the computer system may be selectively booted with an alternate operating system program. This facilitates loading a new version of an operating system, and then rapidly switching back to an old version of the operating system if the new version fails to function properly.

Abstract: One embodiment of the present invention includes a system that translates addresses in a data packet based upon a user identifier in the data packet. The system receives the data packet sent from a source node to a destination node by a user. This data packet includes a source address of the source node, a destination address of the destination node and the user identifier that identifies the user. The system uses the user identifier to look up communication privileges associated with the user. If the communication privileges allow the user to communicate with the destination node, the system replaces the source address in the data packet with a privileged address, and forwards the data packet to the destination node. In a variation on this embodiment, the privileged address is recognized by a system firewall so that it facilitates passage of the packet through firewall.

Abstract: A raster image processor for an all points addressable printer includes at least three digital computer controlled processing units arranged in a parallel processing pipe line. The first unit is a master processing unit that receives printing instructions and generates rendering commands. The record unit is connected to the first unit by a dedicated bus, and receives the rendering commands over the bus and generates bit maps corresponding to the rendering commands. The third unit is a memory unit connected to the second unit by a second dedicated bus, and receives the bit maps from the second unit and stores them in a page memory. All three units are connected by a communications and control bus for overall coordination of the units.

Abstract: Apparatus and method of producing image edge enhancement in four-color printers. The true black color is aligned for printing between the cyan, magenta, and yellow colors. When a black edge is desired, process black and true black are both used to produce the pixels along the edge. Because the process and true black pixels are interleaved with each other along the edge, the effective resolution is doubled and the sharpness is enhanced along the edge.

Abstract: Copy finisher for assembling uncollated or collated copies produced by an electrographic copies into booklets in an intermediate tray, for stapling the booklets, if desired, and for selectively stacking the booklets in an offset or straight manner in an output tray. If a malfunction, such as a paper jam, occurs in the copier, the finisher will assemble the copies in process in the finisher into a booklet and offset stack the booklet in the output tray. If the number of copies in a copy set produced by the copier exceeds the copy assmebling limit of the intermediate tray, the finishing apparatus will assemble the copies of the set into subbooklets of copies equal to or less than the copy limit of the intermediate tray and stack all of the subbooklets of a copy set at the same location in the output tray.

Abstract: A breech and latch mechanism is described herein for use in an aircraft mile ejection launching system. The described mechanism is characterized by a fluid actuated piston that rotates a bell crank and link from a hook locking over-center position to a hook retracting position. The piston acts also as a sequencing valve to pass fluid to pressure actuated ejection rams. A pressure fluid distributing orifice structure and a pyrotechnic cartridge igniting firing pin structure are described also.