Patent ID: 8165302

Claim:
A player device that receives and plays content stored on portable packaged media, the player device comprising: a secure persistent storage device within the player device storing a key table containing a plurality of encryption keys, each encryption key indexed by a key index; a media reader within the player device receiving a portable packaged medium when said portable packaged medium is physically inserted into the media reader by a user for playback of the digital content stored on the portable packaged medium; the media reader reading a first encrypted key index from the portable packaged medium, wherein the first encrypted key index is embedded in a key index packet forming part of a stream of data from the portable packaged medium, and wherein key indices stored on the packaged media are encrypted using a pre-defined default key or public key; a decrypter within the player device programmed to: decrypt the first encrypted key index to obtain first key index using the pre-defined default key or public key; decrypt the digital content stored on the portable packaged medium using a first encryption key identified by the first key index for a time period until a second encrypted key index is encountered on the portable packaged medium; upon subsequently encountering and reading the second encrypted key index, decrypt the second encrypted key index to obtain second key index using the pre-defined default key or public key; change to a second encryption key defined by the second key index after retrieving the second encryption key from the key table using the second key index; decrypt the digital content encountered subsequent to encountering and reading the second encrypted key index by using the second encryption key found in the key table for a time period until another key index is encountered on the portable packaged medium; where the secure persistent storage device stores the key table in a mechanically and electrically secured package that prevents reading the key table stored therein except by the decrypter; and a decoder within the player device that decodes the decrypted digital content stored on the portable packaged medium and provides the decoded digital data as an output.