Patent ID: 7644446
Filing Date: 2010-01-05
Classification: G06F,H04L

Abstract:
1. A method for encrypting content with copy protection for storage on a destination computer-readable medium during a download session, said method comprising: encrypting the content with a content key; generating a medium key specific for the download session to be associated with a destination computer-readable medium; encrypting the content key with the medium key; encrypting the generated medium key with one or more public keys, each of the public keys corresponding to an end user device; defining a medium identifier associated with the destination computer-readable medium, said medium identifier being obtained from the destination computer-readable medium and uniquely identifying the destination computer-readable medium associated therewith; associating the defined medium identifier with the encrypted content; creating a media secret table for the encrypted content for the download session, said media secret table including the encrypted medium key specific to the download session; generating a media secret table identifier uniquely identifying the created media secret table and associating the generated media secret table identifier with the encrypted content; and storing, on the destination computer-readable medium, the encrypted content, the encrypted content key, the encrypted medium key, the created media secret table, and the defined medium identifier associated with the encrypted content, wherein comparing the defined medium identifier associated with the encrypted content to a reference medium identifier prior to rendering the content provides copy protection for the content.