Biometric Identification Document with Error-Based Forgery Detection

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Solution Overview

Problem

Existing identification documents are vulnerable to forgery and alteration of biometric information, making it difficult to verify authenticity and integrity.

Innovation Solution

A method and device that encode biometric data into identification documents with redundancies, generating authentication images with random errors, which are difficult to forge and can detect copies by measuring error rates, and utilize hash functions to secure fingerprint data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If biometric data is encoded with redundancies and random errors are introduced, then security against forgery is improved, but device complexity increases

Engineering Contradiction:

Improvesecurity against forgeryVSAvoidencoding device complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-introducing random errors during the encoding phase before the document is issued. The encoding device deliberately introduces errors at a controlled rate (e.g., 10-30%) during the creation of the identification image, so that when a copy is made, the error pattern changes and reveals the copy. This preliminary error introduction simplifies the verification process by making copies automatically detectable without requiring complex analysis.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by creating a simplified representation of the biometric data in the form of an identification image with embedded errors. The encoding device creates a reduced-version image (e.g., 100x100 pixels) that contains the essential biometric information along with intentional errors. This copying approach allows the system to maintain security while reducing the complexity of processing and verification compared to working with full-resolution biometric data.

Inventive Principle:

Principle #26Copying

2Ease of manufacture

If the identification image is compressed to reduce data size, then manufacturing simplicity is improved, but measurement precision of biometric data deteriorates

Engineering Contradiction:

Improvedata processing simplicityVSAvoidbiometric data precision

Core Design Contradiction:

Ease of manufactureVSMeasurement precision

Solution Approach 1:

The patent applies segmentation by dividing the biometric data into discrete elementary cells (e.g., 100x100 grid) where each cell represents a specific feature or region. This segmentation allows the system to process and store only the essential information needed for identification while discarding redundant details, achieving compression without significant loss of measurement precision for the identification purpose.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses parameter changes by transforming the continuous biometric data into a discrete representation with controlled parameters. The encoding device adjusts parameters such as image resolution (e.g., 100x100 pixels), error rate (10-30%), and cell size to optimize the balance between data compression and measurement precision. This allows the system to maintain sufficient precision for accurate identification while significantly reducing data size for easier processing.

Inventive Principle:

Principle #35Parameter changes

3Difficulty of detecting and measuring

If random errors are introduced in the printed authentication image, then copy detection capability is improved, but manufacturing precision deteriorates

Engineering Contradiction:

Improvecopy detection capabilityVSAvoidprinting precision

Core Design Contradiction:

Difficulty of detecting and measuringVSManufacturing precision

Solution Approach 1:

The patent converts the potentially harmful effect of printing errors into a beneficial feature for security. Instead of striving for perfect printing precision, the system intentionally introduces errors at a controlled rate during the encoding phase. These errors serve as a fingerprint of the original document, making copies detectable. The encoding device deliberately creates this imperfection to turn what would normally be a manufacturing defect into a security feature that protects against forgery.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS10112431B2Methods, devices and identification document for a person or an animal

Publication Date: 2018.10.30 ADVANCED TRACK & TRACE SA

AI summary

A device for producing a document carrying the identification of a person/animal. A first detector to determine the printing conditions of the document. A sensor to obtain the biometric data of the person/animal. A first encoder encodes the biometric data to form a digital identification image including redundancies. A second detector to determine physical characteristics of cells of at least one shape, such that the proportion of cells printed with a print error results from unanticipated unknowns in printing. A second encoder to form, within the shape, an authentication image for authenticating the document and includes elementary cells representing the encoded authentication image. A printer to print the authentication and identification images on the document, and to generate random errors in the printed elementary cells of the authentication image to detect modification to the appearance of the elementary cells.