Security system for a network concentrator
Patent 5311593 Issued on May 10, 1994. Estimated Expiration Date: 
May 13, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 13, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesData transmission security arrangement for a plurality of data stations sharing access to a communication network Key management for encrypted packet based networks Security system network Network message security method and apparatus Third party evavesdropping for bus control Patent #: 5182554 InventorAssigneeApplicationNo. 882517 filed on 05/13/1992US Classes:713/162, Having particular address related cryptography370/400, Having a plurality of nodes performing distributed switching370/403, At least one bus is a ring network370/434, Concentrator370/452, On ring or loop713/155Central trusted authority provides computer authenticationExaminersPrimary: Buczinski, Stephen C.Attorney, Agent or FirmInternational ClassesH04K 001/00H04L 009/02 H04Q 011/04 AbstractA method and apparatus for providing secure communication on open networks. Each port of the network is provided with a security entity which monitors the communication between one port to the other. End stations connected to the ports communicate with other end stations by transmitting data to the port and receiving data from the port. The data is sent out in data packets with a destination address and a source address. Each port has its own unique address. The security entity checks data packets coming into the port for a destination address. The destination address of incoming data packets is compared with the port address of the affiliated port. Also, outgoing data packets from an end station to a port are also monitored by the security entity. The security entity compares the destination and source address of the data packet with the affiliated port address. The security entity cyphers and decyphers a data portion of the data packet depending on whether or not the source address, destination address and port address match. In this way, end stations not destined to read the data portions are thus prevented from doing so. Also end stations which are not authorized to transmit onto the network are prevented from having any users on the network understand their data. | |
