System for securing inbound and outbound data packet flow in a computer network
Patent 5606668 Issued on February 25, 1997. Estimated Expiration Date: 
February 25, 2014. 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.
February 25, 2014. 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 ReferencesGraphical automatic programming Computer language structure for process control applications, and translator therefor Computer language structure for process control applications and method of translating same into program code to operate the computer Patent #: 5247693 InventorAssigneeApplicationNo. 168041 filed on 12/15/1993US Classes:380/42, Data stream/substitution enciphering710/16Characteristic discriminationExaminersPrimary: Lee, Thomas C.Assistant: Krick, Rehana Perveen Attorney, Agent or FirmInternational ClassesG06F 013/36G06F 015/401 AbstractA filter module allows controlling network security by specifying security rules for traffic in the network and accepting or dropping communication packets according to these security rules. A set of security rules are defined in a high level form and are translated into a packet filter code. The packet filter code is loaded into packet filter modules located in strategic points in the network. Each packet transmitted or received at these locations is inspected by performing the instructions in the packet filter code. The result of the packet filter code operation decides whether to accept (pass) or reject (drop) the packet, disallowing the communication attempt.Other References
Field of SearchData stream/substitution enciphering | |
