IP Library › Granted Patent US 7,938,333
Granted Patent B2
US 7,938,333 · App. 12/917,355 · Granted May 10, 2011

Secure core material for documents

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Quick Facts
Patent No.
US 7,938,333
App. No.
12/917,355
Filed
Nov 1, 2010
Granted
May 10, 2011
Kind
B2
Art Unit
2876
USPC
235/491
Abstract

Particles conveying a code are incorporated into polymer matrix to form a core document substrate. These particles may be colored to create a distinctive look of the document that makes it unique for a particular document issuer and enables visual authentication. Addition of a covert attribute to the particle, such as a UV pigment or hidden layer of material, allows a covert, forensic characteristic and it also allows a mathematical description to be calculated describing the random distribution of a specific area on a document and then captured on it (e.g., in the bar code or magnetic stripe or digital watermark on an ID document).

Claims (23)

1. A secure identification document comprising:

a substrate, the substrate comprising:

a substrate polymer material; and

a plurality of particles, the plurality of particles comprising a non-reactive material and a covert material,

wherein the plurality of particles are configured to form a random distribution within the substrate polymer material; and

a machine readable data carrier within the secure identification document, the machine readable data carrier storing data,

wherein a representation of the random distribution correlates to at least a portion of the data stored in the machine readable data carrier.

2. The secure identification document of claim 1 , wherein the substrate polymer material is a polyolefin/silica matrix.

3. The secure identification document of claim 1 , wherein the non-reactive material is clay.

4. The secure identification document of claim 1 , wherein the covert material is a UV pigment.

5. The secure identification document of claim 1 , wherein the random distribution of the plurality of particles remains constant over a usage life of the secure identification document.

6. The secure identification document of claim 1 , wherein the representation is a mathematical description.

7. The secure identification document of claim 6 , wherein the mathematical description is a hash.

8. The secure identification document of claim 1 , wherein the machine readable data carrier comprises at least one of a bar code, a magnetic stripe, a digital watermark, a RF chip, and an optical media.

9. The secure identification document of claim 1 , further comprising an image receiving layer adjacent to at least one surface of the substrate.

10. The secure identification document of claim 1 , further comprising a laminate layer.

11. A method of making a secure identification document, comprising:

mixing a non-reactive material with a covert material to form a plurality of particles;

blending the plurality of particles within a substrate polymer material to form a random distribution;

capturing a representation of the random distribution; and

embedding the representation in a machine readable data carrier within the secure identification document.

12. The method of claim 11 , further comprising: encoding the representation before embedding.

13. The method of claim 11 , further comprising: storing the representation in a database.