05872850 is referenced by 262 patents and cites 3 patents.

A 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.

Title
System for enabling information marketplace
Application Number
597442
Publication Number
5872850
Application Date
March 31, 1997
Publication Date
February 16, 1999
Inventor
Upendra Shardanand
Cambridge
MA, US
Max E Metral
Boston
MA, US
Saul Charles Klein
Boston
MA, US
Agent
Michaelson & Wallace
Agent
Peter L Michaelson
Assignee
Microsoft Corporation
WA, US
IPC
H04L 9/00
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