Patent ID: 8121952

Claim:
A method of producing pre-recorded multimedia content on a physical media, the method comprising: placing at least one media key block, a volume ID, and a unique key in the media key block on the physical media, and the unique key is a mathematical combination of the media key and the volume ID; placing the pre-recorded multimedia content on the physical media into a plurality of independently playable titles encrypted with one or more encryption content keys; placing at least one special file with addresses of web service providers on the physical media and the special files are cryptographically hashed with the encryption content keys; encrypting the encryption content keys with a first key derived from the media key block to produce encrypted encryption content keys; delivering a permission to decrypt at least one of the titles to a player of the physical media, and the permission including the encrypted encryption content keys; allowing a media player to perform each of the following generating a second key derived from the media key block to decrypt the encrypted encryption content keys; calculating a value for the unique key for the physical media; generating a hash value of the special files; and in response to the value of the unique key matching the unique key stored on the physical media selectively enabling the at least one of the titles for selective playback of the multimedia content in response to delivering the permission by decrypting the encrypted encryption content keys with the unique key and the hash value of the special files.