Disc serialization
AssigneeMicrosoft Corporation
InventorsLester L. Waters, Jonathan D. Lazarus
Life of this patent
Estimating the term…
Abstract
Several approaches to serializing a disc may be used in the present invention. First, portions of a disc (such as sector(s) or track(s)) may be physically damaged to create a pattern of damage that somewhat uniquely identifies the disc. A number of different techniques may be used to damage the disc. For instance, laser devices may be used, sharp devices may be used or a master disc may be configured to create the damage. The physical damage may be used in conjunction with soft damage that is encoded in software on the disc. Alternatively, certain soft damage approaches may be used separately to serialize the disc.
Claims25
A method of serializing a read-only optical disc comprising the steps of:
- physically damaging a portion of the optical disc to create a pattern of damage;
- encoding the pattern of damage in an identifying value to distinguish the optical disc from other optical discs;
- encrypting the identifying value;
- and
- marking the optical disc with the encrypted value.
A method of serializing a first optical disc and a second optical disc, comprising the steps of:
- physically damaging a portion of the first optical disc to create a first pattern of damage;
- generating a first identifying value that encodes the first pattern of damage;
- encrypting the first identifying value;
- marking the first optical disc with the encrypted first identifying value;
- Physically damaging a portion of the second optical disc to create a second pattern of damage that differs from the first pattern of damage;
- generating a second identifying value that encodes the second pattern of damage, the identifying values of the first optical disc and the second optical disc for distinguishing the first optical disc from the second optical disc;
- encrypting the second identifying value;
- and
- marking the second optical disc with the encrypted second identifying value.
An optical disc comprising:
- a physically damaged portion that is damaged to create a pattern of damage on the optical disc;
- a non-damaged portion for storing data in a read-only format;
- and
- an encrypted value marker that encrypts an identifying value for distinguishing the optical disc from other optical discs, wherein said identifying value encodes the pattern of damage in the physically damaged portion.
A method of serializing an optical disc comprising the steps of:
- physically damaging a portion of the optical disc to create a pattern of damage;
- encoding the pattern of damage in a first value;
- combining the first value with a second value to produce a combined value;
- encrypting the combined value to produce an encrypted identifying value;
- and
- marking the optical disc with the encrypted identifying value to distinguish the optical disc from other optical discs.
A method of serializing a plurality of optical discs comprising the steps of:
- for each disc,
- selecting an identifying value that is different from the identifying values of other discs so as to distinguish the disc from other disc;
- physically damaging a portion of the disc to create a pattern of damage that encodes the identifying value;
- encrypting the identifying value;
- and
- marking the disc with the encrypted value.
A method of serializing an optical disc and authorizing a user of the optical disc comprising the steps of:
- physically damaging a portion of the disc to create a pattern of damage;
- encoding the pattern of damage in an identifying value to distinguish the disc from other discs;
- encrypting the identifying value;
- providing the disc with the encrypted value;
- decrypting the encrypted value;
- detecting by a disc reader the pattern of damage in the physically damaged portion of the disc;
- and
- authorizing the user of the disc when the detected pattern of damage corresponds to the decrypted value.
Dependencies are inferred from the claim text.