Patent ID: 7873987

Claim:
A content delivery system including a server and a content processing apparatus, connected to each other across a network, wherein: the server comprises: a first license supplying means for supplying the content processing apparatus with a first license including a content key for a content in the content processing apparatus, the content key being used to encrypt the content; a content supplying means for supplying the content processing apparatus with a series of data included in the content and which includes license identification information indicative of whether a sublicense, including the content key, exists for processing the content; and a sublicense supplying means for supplying the content processing apparatus with the sublicense for the content, wherein the sublicense is associated with a main license for a subscription contract for a content channel including multiple contents, the multiple contents including the content; and the content processing apparatus includes: a judging means for judging, based on the license identification information included in the series of data supplied from the server, whether a sublicense exists for processing the content; a license acquiring means for acquiring the sublicense based on the result of judgment from the judging means; and a data reproducing means for reproducing content resource data included in the series of data supplied from the content supplying means using the content key retrieved from at least one of the first license and the sublicense based on the result of judgment from the judging means.