Patent ID: 7139808
Filing Date: 2006-11-21
Classification: H04L

Abstract:
1. A method comprising: generating a content identifier for at least one article, the content identifier representing the at least one article, the content identifier is a hash of contents of the at least one article and at least one portion of metadata, generating a client-invariant content descriptor including the content identifier, contents of the at least one article, commonly shared metadata between at least two clients and a content signaturing mechanism identifier, determining if at least one portion of the at least one article is present on at least one device based on the content identifier, generating at least one portion of at least one differential contour for a plurality of articles storing the at least one portion of the at least one article if the at least one portion of the at least one article is determined to be not present on the at least one device, and transmitting only an article identifier if the at least one article only has client-specific information modified from prior information.