Patent ID: 7325139
Filing Date: 2008-01-29
Classification: G06F,H04L

Abstract:
1. An information processing apparatus that permits use of content on the basis of a usage right associated with the content, comprising: first selection means for selecting content to be stored on a content storage device; first verification means for verifying a first digital signature added to the content selected by the first selection means; storage means for storing a usage right permitting use of the content selected by the first selection means, wherein the usage right includes at least one of usage rules, an expiration date and a digital signature; retrieving means for retrieving, from the storage means, the usage right associated with the content selected by the first selection means; second verification means for verifying a second digital signature added to the usage right retrieved by the retrieving means; first data generating means for generating first alteration detecting data on the basis of information included in the usage right retrieved by the retrieving means; and first output means for outputting the usage right, the first alteration detecting data generated by the first data generating means, and the content to the content storage device upon determination that, on the basis of the verification result by the first verification means and the verification result by the second verification means, the content and the usage right are unaltered.