×

System, method, and device for playing back recorded audio, video or other content from non-volatile memory cards, compact disks or other media

  • US 20020176575A1
  • Filed: 12/06/2001
  • Published: 11/28/2002
  • Est. Priority Date: 12/07/2000
  • Status: Active Grant
First Claim
Patent Images

1. A method of accessing an encrypted track on a removable media with a device, the track comprising frames having content, the method comprising:

  • authorizing the media;

    decrypting the track by a process comprising;

    (a) calculating a media unique key; and

    thereafter (b) decrypting a title key stored in the memory of the device with the media unique key; and

    thereafter (c) decrypting a group of frames; and

    thereafter (d) deleting the decrypted title key;

    (e) deleting the media unique key; and

    (f) repeating (a) through (e) until the entire track is completed.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×