3D Printed Object Authentication via Embedded Microstructures
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Solution Overview
Problem
Conventional methods for authenticating 3D-printed objects are inadequate as they can be easily copied, leading to potential counterfeiting issues, especially with the proliferation of 3D printing and scanning technologies.
Innovation Solution
A system that embeds authentication information as physical structures within 3D-printed objects using a database and authentication module, where encrypted serial numbers and signatures are inserted into CAD files and printed as microscopic variations or structures, allowing for verification using 3D scanners and an authentication server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional authentication methods (seals, watermarks, holograms, bar codes) are used, then authentication capability is provided, but the authentication features can be easily copied and detected by counterfeitors
Solution Approach 1:
The patent uses 3D scanning to create digital copies of physical authentication features, then embeds these digital representations into the 3D printed object. The authentication feature consists of microscopic physical structures that are copied digitally and embedded in the object's CAD file, making them difficult to replicate physically while maintaining authentication capability
Solution Approach 2:
The patent replaces traditional mechanical authentication features (seals, watermarks, holograms) with digitally embedded authentication information that is physically represented as microscopic structures. This substitution moves authentication from visible mechanical features to embedded digital data represented at the micro-scale, reducing copyability
2Object-affected harmful factors
If authentication information is embedded as microscopic physical structures, then counterfeiting protection is improved, but detection and verification complexity increases
Solution Approach 1:
The patent uses 3D scanning to create digital copies of the microscopic physical structures, then verifies authentication by comparing the scanned digital representation against the embedded digital authentication data. This copying approach simplifies detection by converting physical micro-structures into digital data that can be easily stored, transmitted, and verified
Solution Approach 2:
The patent introduces a 3D scanner as an intermediary device that bridges the gap between the microscopic physical authentication structures and the digital verification system. The scanner converts the physical micro-structures into digital data, which then can be compared against the embedded authentication information, simplifying the verification process
3Reliability
If authentication information is embedded in CAD files during printing, then authentication integration is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent embeds authentication information into the CAD file before the 3D printing process begins. The authentication data is prepared in advance and integrated into the digital model, so that when the object is printed, the authentication features are automatically incorporated as part of the manufacturing process rather than requiring separate post-processing steps
Solution Approach 2:
The patent merges the authentication information with the object's design data in a single CAD file. The authentication features are combined with the functional geometry of the object, allowing both to be manufactured simultaneously in one 3D printing process, thereby reducing overall manufacturing complexity
Data Source
AI summary
When printing 3D objects designed by a particular designer, authentication information such as a serial number and a digital signature of the designer are inserted into a CAD file for printing the object. The authentication information is represented as physical structures in or on the 3D-printed object. The physical structures (e.g., pits, cavities of one or more shapes, etc.) can be detected by a scanner (e.g., an ultrasound or the like), and the detected authentication information can be transmitted to an authentication server that determines the authenticity of the 3D-printed object and transmits the authenticity determination to a user.