Patent ID: 9660821
Date: 2017-05-23
CPC Classifications: G06F,H04L,H04W

Claim:
1. A system for distributing document files comprised of a computer server and at least one remote computing device associated with a corresponding at least one viewer operating a viewer program on the remote device, said system comprised of: a conversion subsystem comprised of logic operating on the server configured to receive a document file and convert the document file into a predetermined image format file that is displayable by the viewer program and a representative thumbnail image file; a data storage subsystem comprised of logic comprised of a database configured to persistently store data that associates the received document file with the image format file, the thumbnail image file and the corresponding at least one content tag data, and to persistently store data that associates the at least one channel tag data with the corresponding at least one viewers; wherein the routing subsystem is further configured to select a subset of the selected viewers where a restriction condition encoded in the at least one content tag data associated with the document file applies to the channel tag data associated with the viewers comprising the selected subset and in dependence on such determination, prevent transmission of the document file to the remote devices associated with the selected subset of viewers, wherein the restriction condition is one of: the channel tag data associated with the selected subset of viewers not including values indicating permission to access the document file, the IP address of the remote computer not being within some predetermined range associated with the document file, and a domain associated with the selected subset of viewers not being associated with a permissible domain associated with the document file.