OPTICAL DNA

• US 20080273435A1
• Filed: 03/22/2007
• Published: 11/06/2008
• Est. Priority Date: 03/22/2007
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Kirovski, Darko, Vijaywargiay, Deepak, Lewis, David L., Colon, Estrada T., Powell, Thomas Patrick
• Granted Patent: US 8,788,848 B2
• Time in Patent Office: Days
• US Class Current: 369/53.21
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00123 the record carrier being identified by recognising some of its unique characteristics, e.g. a unique defect pattern serving as a physical signature of the record carrier
• CPC Class Codes: H04L 2209/30 Compression, e.g. Merkle-Damgard construction
• CPC Class Codes: H04L 2209/603 Digital right managament [DRM]
• CPC Class Codes: H04L 9/3247 involving digital signatures

Abstract

The claimed subject matter relates to architectures and/or mechanisms that can facilitate issuing, embedding and verification of an optical DNA (o-DNA) signature. A first mechanism is provided for obtaining a set of manufacturing errors inherent in an optical media instance. These errors can be encoded into the o-DNA that can be cryptographically signed with a private key, then embedded into the source optical media instance. A second mechanism is provided that can decrypt the o-DNA with a public key and compare the authenticated errors to the observed errors to ascertain whether the optical media instance is authentic as opposed to a forgery or counterfeit.

Claims

1. A system that issues an optical DNA (o-DNA) signature to facilitate authentication of optical media, comprising:

an examination component that receives error data associated with an optical media instance, the examination component employs the error data to construct a fingerprint associated with the optical media instance; and

an issuing component that generates an o-DNA signature for the optical media instance based at least in part upon the fingerprint.

2. The system of claim 1, the examination component constructs the fingerprint based upon a count of and respective locations of a set of manufacturing errors extant in the optical media instance.

3. The system of claim 1, the fingerprint is a fixed-length bit-string that is an optimized or compressed representation of relevant error data.

4. The system of claim 1, the issuing component concatenates the fingerprint with a tag to generate the o-DNA signature.

5. The system of claim 4, the tag comprises a product ID associated with content stored in the optical media instance.

6. The system of claim 1, the issuing component cryptographically signs the fingerprint to generate the o-DNA signature.

7. The system of claim 6, the fingerprint is cryptographically signed with a private key associated with an issuer.

8. The system of claim 1, further comprising an impression component that embeds the o-DNA signature in the optical media instance.

9. A system that verifies an o-DNA signature to facilitate authentication of optical media, comprising:

a receiving component that receives information read from an optical media instance, the information comprising an o-DNA signature and error data associated with the optical media instance; and

a verification component that compares the o-DNA signature to the error data.

10. The system of claim 9, the error data comprises a count and respective positions of a set of manufacturing errors extant in the optical media instance.

11. The system of claim 9, the verification component decrypts the o-DNA signature to compare the o-DNA signature to the error data.

12. The system of claim 11, the verification component employs a public key associated with an issuer to decrypt the o-DNA signature.

13. The system of claim 9, the verification component decomposes the o-DNA signature into a tag associated with content stored on the optical media instance and a fixed-length bit-string that represents authenticated errors extant on an authentic optical media instance.

14. The system of claim 13, the verification component compares the authenticated errors to the error data to determine whether the optical media instance is authentic.

15. The system of claim 14, the optical media instance is authentic when a degree of similarity between the authenticated errors to the error data surpasses a predefined threshold.

16. The system of claim 9, further comprising a notification component that transmits a notification that the optical media instance is not authentic.

17. An optical media instance, comprising:

a set of manufacturing errors; and

an o-DNA signature that encodes a pattern of a subset of the set of manufacturing errors to facilitate authentication of the optical media instance.

18. The optical media instance of claim 17, the o-DNA signature is cryptographically signed with a key associated with an issuer.

19. The optical media instance of claim 18, the issuer is at least one of an author or rights-holder of content stored on the optical media instance, a manufacturer of the optical media instance, or an agent of the author, the rights-holder, or the manufacturer.

20. The optical media instance of claim 17, the subset comprises manufacturing errors from the set of manufacturing errors that occur within a designated distance from an adjacent manufacturing error.