# US 7,467,300 B2 · Coded data including a distributed data stream

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- Number: US 7,467,300 B2
- Document ID: US7467300B2
- Status: Granted
- Kind: B2
- Application number: 11/041,723
- Filed: 2005-01-25
- Published: 2005-11-24
- Granted: 2008-12-16
- Earliest claimed: 2004-05-18
- Assignees: Silverbrook Research Pty Ltd
- Inventors: Paul Lapstun; Kia Silverbrook
- Web page: https://patentgrep.com/patent/US7467300B2

## CPC

- G06Q 30/018: Certifying business or products
- G06Q 10/087: Inventory or stock management, e.g. order filling, procurement or balancing against orders
- G06Q 10/0877: {by inventory control or reporting using inventory tracking or counting}
- G06Q 20/105: {involving programming of a portable memory device, e.g. IC cards, "electronic purses"}
- G06Q 20/367: {involving electronic purses or money safes}
- G06Q 20/3674: {involving authentication}
- G06Q 30/0185: {Product, service or business identity fraud}
- G06Q 40/08: Insurance
- G06Q 40/12: Accounting
- G07D 7/004: using digital security elements, e.g. information coded on a magnetic thread or strip
- H04L 9/3247: {involving digital signatures}
- H04L 2209/20: Manipulating the length of blocks of bits, e.g. padding or block truncation
- H04L 2209/56: Financial cryptography, e.g. electronic payment or e-cash
- H04L 2209/805: Lightweight hardware, e.g. radio-frequency identification [RFID] or sensor
- Y02A 90/10: Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
- G06Q: INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G07D: HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

Coded data for disposal on or in a surface that includes a number of coded data portions. Each coded data portion encodes an identity of an object or the like associated with the surface. In addition, each coded data portion encodes at least part of a data object so that the data object is encoded in its entirety over a number of data portions, thereby allowing the data object to be reconstructed. The data object can include digital data relating to the object, such as product information, or a digital signature of at least part of the identity.

## Claims

### Claim 1

An apparatus for authenticating an object, the apparatus comprising:
means for sensing coded data provided on a plurality of regions of a surface associated with the object;
means for determining, from the coded data of each sensed region, an identity of the object, a signature fragment, and a signature fragment identifier associated with the signature fragment of the sensed region;
means for determining a determined signature by arranging the plurality of signature fragments according to their associated signature fragment identifiers;
means for generating, using the determined signature and a key, a generated identity;
means for comparing the identity to the generated identity; and
means for authenticating the object using the results of the comparison.

### Claim 2 (depends on 1)

The apparatus 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.

### Claim 3 (depends on 2)

The apparatus according to claim 2, wherein the predetermined padding is associated with and unique to the identity.

### Claim 4 (depends on 1)

The apparatus according to claim 1, wherein the coded data is provided substantially coincident with visible human-readable information.