Patent ID: 7979700

Claim:
A digital content management device adapted to be selectively linked with a digital appliance for end use of a digital document, comprising: a nonvolatile storage section configured to store the digital document, wherein the digital document is stored in a form where content of the digital document is accessible within the digital content management device, wherein the nonvolatile storage section includes a first portion that is accessible by the digital appliance and a second portion that is inaccessible by the digital appliance, the digital document being stored in the second portion; a controller configured to: send authentication information to an external server via the digital appliance in order authenticate the digital content management device, render the stored digital document into a presentation equivalent format for the digital appliance, and send the digital document only in the presentation equivalent format to the digital appliance, wherein at least a portion of the content of the digital document is not accessible to the digital appliance in said presentation equivalent format; and an interface configured to: selectively link with the digital appliance and communicate at least part of the digital document to the digital appliance in the presentation equivalent format, and receive the digital document from the digital appliance in response to authentication of the digital content management device to the external server, wherein the digital document is accessible to the digital appliance only in the presentation equivalent format.