Patent ID: 6631359
Filing Date: 2003-10-07
Classification: G06Q,G11B

Abstract:
A method for controlling access to optical disc content, comprising:providing at least first content on each of a plurality of optical disks, said optical disks readable by at least a first optical disk reader, said disk reader being configured such that at least a first region of said optical disks are non-user accessible, said content requiring at least a first key for use; providing identifier numbers on said non-user accessible regions of said plurality of optical disks, said identifier numbers being readable by said optical disk reader, wherein no two of said plurality of disks have the same identifier number; calculating said key, in a calculation device coupled to said reader, using both said identifier number on a first optical disk and a second number different from said identifier number, wherein use of said content is enabled if said key indicates that access to said content should be permitted.