Patent ID: 8312294
Filing Date: 2012-11-13
Classification: G06F,H04L

Abstract:
1. An information processing apparatus to which a storage medium is connected, wherein the storage medium is configured to store title keys configured to encrypt a content, a first application key and a second application key configured to encrypt the title keys for each application of the content, a media key block, an authentication key, and a media unique key; the media key block comprises encrypted media keys encrypted by different device keys; the first application key and the second application key are encrypted by the media unique key; the media unique key is obtained from a media key and a media identifier; the information processing apparatus comprises: the storage medium comprises an update module configured to compare the media key block supplied from the information processing apparatus with the media key block stored in the storage medium in order to determine which is newer and to rewrite an old media key block stored in the storage medium with a new media key block supplied from the information processing apparatus.