System for authenticating encoded object

• US 7,658,325 B2
• Filed: 10/07/2008
• Issued: 02/09/2010
• Est. Priority Date: 05/18/2004
• Status: Expired due to Fees

• Current Assignee: Silverbrook Research Pty Limited
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Silverbrook, Kia, Lapstun, Paul
• Primary Examiner(s): Frech; Karl D.
• Application Number:
  US12/247,160
• Publication Number:
  US 20090032583A1
• Time in Patent Office: 490 Days
• Field of Search: 235/379, 235/454, 235/494, 235/487, 235/380, 713/176, 705/2, 705/75, 702/2, 702/75
• US Class Current: 235/380
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders
• CPC Class Codes: G06Q 20/105 involving programming of a portable memory device, e.g. IC cards, "electronic purses"
• CPC Class Codes: G06Q 20/367 involving electronic purses or money safes
• CPC Class Codes: G06Q 20/3674 involving authentication
• CPC Class Codes: G06Q 30/018 Certifying business or products
• CPC Class Codes: G06Q 30/0185 Product, service or business identity fraud
• CPC Class Codes: G06Q 40/08 Insurance
• CPC Class Codes: G06Q 40/12 Accounting
• CPC Class Codes: G07D 7/004 using digital security elements, e.g. information coded on a magnetic thread or strip
• CPC Class Codes: H04L 2209/20 Manipulating the length of blocks of bits, e.g. padding or block truncation
• CPC Class Codes: H04L 2209/56 Financial cryptography, e.g. electronic payment or e-cash
• CPC Class Codes: H04L 2209/805 Lightweight hardware, e.g. radio-frequency identification [RFID] or sensor
• CPC Class Codes: H04L 9/3247 involving digital signatures
• CPC Class Codes: Y02A 90/10 Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

A system for authenticating an object is provided having means for sensing coded tags printed on the object which each encode an identity of the object, a signature fragment and a signature fragment identifier associated with the signature fragment, means for identifying a determined signature from the identity, signature fragment and signature fragment identifier encoded by at least one sensed coded tag, means for generating, using the determined signature and a key, a generated identity, means for comparing the identity encoded by the sensed coded tag with the generated identity, and means for authenticating the object using the results of the comparison.

Claims

1. A system for authenticating an object comprising:

means for sensing coded tags printed on the object, each coded tags encoding an identity of the object, a signature fragment and a signature fragment identifier associated with the signature fragment;

means for identifying a determined signature from the identity, signature fragment and signature fragment identifier encoded by at least one sensed coded tag;

means for generating, using the determined signature and a key, a generated identity;

means for comparing the identity encoded by said at least one sensed coded tag with the generated identity; and

means for authenticating the object using the results of the comparison.

2. A system according to claim 1, wherein the signature is a digital signature of at least part of the identity and at least part of predetermined padding.

3. A system according to claim 1, wherein the predetermined padding is associated with and unique to the identity.

4. A system according to claim 1, wherein the coded tags are printed in invisible ink.

5. A system according to claim 4, wherein the coded tags are printed substantially coincident with visible human-readable information on the object.