Patent ID: 7702592
Filing Date: 2010-04-20
Classification: G06Q,G11B

Abstract:
1. A method for writing content to a media, comprising: retrieving a first portion of a key structure from a media where the first portion of the key structure is pre-recorded on the media; generating a second portion of the key structure based on the retrieved first portion of the key structure retrieved from the media following the retrieval of the first portion of the key structure from the media; encrypting content based at least on the second portion of the key structure, producing encrypted content; writing, through a processor programmed to record digital content, the encrypted content onto the media comprising writing the encrypted content to a data portion of the media; wherein the first portion of the key structure is pre-recorded to a control area of the media prior to retrieving the first portion of the key structure to be used once retrieved from the media in generating the second portion of the key structure, and the first portion of the key structure comprises pre-recorded disk key and device key set; accessing a remote authority; generating a third portion of the key structure from information provided by the remote authority; and writing the third portion of the key structure to the media; wherein the encrypting the content comprises encrypting the content using both the second and third portions of the key structure such that the single instance of the encrypted content is encrypted according to both the second and third portions of the key structure.