Patent ID: 7356511
Filing Date: 2008-04-08
Classification: G06F

Abstract:
1. A method for marking content during distribution of the content to a client, comprising: receiving a request for the content from the client at a server; obtaining a content identifier for the content; generating a version identifier that uniquely identifies a version of the content that is sent to the client; storing the content identifier and the version identifier in a database; creating the version of the content by marking the content with the version identifier such that removal of the mark degrades the quality or usability of the content and renders the content unusable; delivering the version of the content with markings to the client; wherein marking the version of the content with the version identifier involves marking different sections of the content using different marking methods, so that any given section of the content is not operated on by all of the marking methods; and whereby the markings on the version of the content facilitate subsequent identification of the client by examining the version of the content or a copy of the version of the content.