Copy protection for recorded media

A method of providing copy protection during the transfer of a media key and a disk key of a previously recorded disk containing encrypted data, from the disk to an output controller of a playback device, the output controller having an output controller key associated therewith, said method comprising the steps of:

• generating a first random secure transfer key in the playback device with a uniqueness factor derived from phase lock loop circuitry;
• forming a second secure transfer key by combining the first secure transfer key with the output controller key;
• forming a third transfer key by using the second secure transfer key to encrypt the media key and the disk key;
• and
• transferring the third secure transfer key to the output controller.

A copy protection apparatus comprising:

• a data storage medium having encrypted data stored thereon, said encrypted data having a data key associated therewith, said data key stored on said data storage medium, said data storage medium includes a data storage medium key associated therewith;
• a playback device including a media access device and an output device, said media access device accessing the encrypted data stored on said data storage medium and accessing said data key and said data storage medium key;
• said output device having a output device key associated therewith;
• means for generating a first secure random transfer key with a uniqueness factor derived from phase lock loop circuitry;
• means for generating a second secure transfer key by combining said first secure transfer key with said output device key;
• and
• means for generating a third secure transfer key by using said second secure transfer key to encrypt said data storage medium key and said data key;
• wherein subsequent to said third key being generated, said third key is transferred to said output device whereupon said data key and said data storage medium key are decrypted.