PROCEDE ET DISPOSITIF D'AUTHENTIFICATION

• US 20090308530A1
• Filed: 02/05/2007
• Published: 12/17/2009
• Est. Priority Date: 02/03/2006
• Status: Active Grant

• Current Assignee: Advanced Track & Trace
• Original Assignee: Advanced Track & Trace
• Inventors: Massicot, Jean-Pierre, Foucou, Alain, Sagan, Zbigniew
• Granted Patent: US 8,125,697 B2
• Time in Patent Office: Days
• US Class Current: 156/272.800
• CPC Class Codes: B41M 3/14 Security printing securities B42D25/29
• CPC Class Codes: B41M 5/24 Ablative recording, e.g. by burning marks; Spark recording marking by high energetic means, e.g. by laser otherwise than burning or ablative removal B41M5/26; materials or methods for recording or reproduction by optical means G11B7/00
• CPC Class Codes: G03H 1/0011 for security or authentication holograms on information-bearing cards B42D25/328; testing papers with holograms G07D7/0032
• CPC Class Codes: G06F 21/31 User authentication
• CPC Class Codes: G06F 2221/2151 Time stamp
• CPC Class Codes: G06Q 20/3823 combining multiple encryption tools for a transaction
• CPC Class Codes: G06Q 20/40 Authorisation, e.g. identification of payer or payee, verification of customer or shop credentials; Review and approval of payers, e.g. check credit lines or negative lists
• CPC Class Codes: G07D 7/004 using digital security elements, e.g. information coded on a magnetic thread or strip
• CPC Class Codes: G09C 1/00 Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system cryptographic typewriters G09C3/00
• CPC Class Codes: H04L 2209/20 Manipulating the length of blocks of bits, e.g. padding or block truncation
• CPC Class Codes: H04L 2209/603 Digital right managament [DRM]
• CPC Class Codes: H04L 9/3242 involving keyed hash functions, e.g. message authentication codes [MACs], CBC-MAC or HMAC
• CPC Class Codes: H04L 9/3297 involving time stamps, e.g. generation of time stamps

Abstract

The authentication process comprises:

• • a step of transferring a holographic matrix onto a base,
  • a step of marking the holographic matrix by laser shot, in order to produce a digital code that cannot be interpreted by the human eye, preserving the optical diffraction properties of the holographic matrix, and designed to enable the detection of a copy of a document realized using the holographic matrix.

Preferentially, during the marking step, the impact of each laser shot presents a greater dimension and a depth allowing the hologram'"'"'s optical diffraction properties to be preserved.

Claims

1-7. -7. (canceled)

8. An authentication process, that comprises:

a step of transferring a holographic matrix onto a base,

a step of marking said holographic matrix by laser shot, in order to produce a digital code that cannot be interpreted by the human eye, preserving the optical diffraction properties of the holographic matrix, and designed to enable the detection of a copy of a document realized using said holographic matrix.

9. An authentication process according to claim 8, wherein, during the marking step, the impact of each laser shot presents a greater dimension and a depth allowing the hologram'"'"'s optical diffraction properties to be preserved.

10. An authentication process according to claim 8, that comprises a step of determining the digital code so that this digital code is representative of an identifier of a product associated to the hologram represented by the holographic matrix.

11. An authentication process according to claim 8, wherein, during the step of marking, a plurality of different digital codes are produced, each associated to an identical holographic matrix.

12. An authentication process according to claim 8, wherein, during the step of marking, the digital codes are placed, with respect to the corresponding holographic matrices, in different positions.

13. An authentication process according to claim 8, wherein, during the step of marking, a relative position of the digital code and the holographic matrix is dependent on an item of data represented by said digital code.

14. An authentication process according to claim 8, that comprises a step of determining an additional code and a step of printing said additional code on a document produced using said holographic matrix.

15. An authentication device, characterized in that it comprises:

a means of transferring a holographic matrix onto a base and

a means of marking said holographic matrix by laser shot, in order to produce a digital code that cannot be interpreted by the human eye, preserving the optical diffraction properties of the holographic matrix, and designed to enable the detection of a copy of a document realized using said holographic matrix.

16. An authentication device according to claim 15, wherein the means of marking is adapted so that the impact of each laser shot presents a greater dimension and a depth allowing the hologram'"'"'s optical diffraction properties to be preserved.

17. An authentication device according to claim 15, that comprises a means of determining the digital code so that this digital code is representative of an identifier of a product associated to the hologram represented by the holographic matrix.

18. An authentication device according to claim 15, wherein the means of marking is adapted to produce a plurality of different digital codes, each associated to an identical holographic matrix.

19. An authentication device according to claim 15, wherein the means of marking is adapted to place the digital codes in different positions, with respect to the corresponding holographic matrices.

20. An authentication device according to claim 15, wherein the means of marking is adapted so that a relative position of the digital code and the holographic matrix is dependent on an item of data represented by said digital code.

21. An authentication device according to claim 15, that comprises a means of determining an additional code and a means of printing said additional code on a document produced using said holographic matrix.