Patent ID: 7827113

Claim:
A method of distributing content for use by a client, the method comprising: transmitting, using a central processing unit (CPU), identification data for licensed content to the client by sending to the client a license having the identification data for the licensed content; transmitting a first item of content to the client after receipt by the client of the license, wherein at least a portion of the first item of content is in encrypted form, and wherein the first item of content has first content identification data; transmitting a second item of content to the client after receipt by the client of the license, wherein at least a portion of the second item of content is in encrypted form, and wherein the second item of content has second content identification data that is different from the first content identification data; wherein at least a portion of the identification data for licensed content in the license corresponds to the first content identification data and the second content identification data; comparing by the client of the first content identification data with the identification data for licensed content as taken from the license; decrypting by the client of the encrypted portion of the first item of content after the comparing by the client of the first content identification data with the identification data for licensed content; comparing by the client of the second content identification data with the identification data for licensed content as taken from the license; and decrypting by the client of the encrypted portion of the second item of content after the comparing by the client of the second content identification data with the identification data for licensed content, wherein the identification data for licensed content that is located at the client is adapted to remain unchanged after the license is sent to the client.