System for enabling information marketplace
Patent 5872850 Issued on February 16, 1999. Estimated Expiration Date: 
March 31, 2017. 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.
March 31, 2017. 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 ReferencesModifying a television signal to inhibit recording/reproduction Anti-copying video signal processing ATM packet demultiplexer for use in full service network having distributed architecture Patent #: 5544161 InventorsAssigneeApplicationNo. 828632 filed on 03/31/1997US Classes:705/51Usage protection of distributed data filesExaminersPrimary: Cangialosi, SalvatoreAttorney, Agent or FirmInternational ClassH04L 009/00AbstractA system for enabling an information marketplace includes a central server which stores data in a memory element. The data may or may not be encrypted. Regardless of whether the data is encrypted the server may also store a table which associates data elements and nodes with an authorization value. If a node requests data for which the authorization value in the table gives the node authorization to access, the server transmits the data to the node. If the data is encrypted, the server may transmit the encrypted data or it may decrypt the data for the node before transmission. In other embodiments, no table is stored by the server. In these embodiments the data is encrypted using one or more encryption keys. When a node requests data the server transmits the encrypted data to the node. If the node does not have the proper encryption keys, it may request them from the server. | |
