Rotating Magnetic PUF for Printer Supply Authentication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Counterfeit printer supplies, such as toner cartridges, are difficult to deter due to their ability to perform poorly and potentially damage printers, and existing authentication systems are not effectively maximized to prevent replication, necessitating a robust anti-counterfeit solution.
Innovation Solution
A system incorporating a substrate with rotating magnetic and non-magnetic particles, where a non-volatile memory device stores field data corresponding to a magnetic field generated by the particles along a circular path, enhancing the difficulty of replication through encryption and image data measurement, integrated with a PUF reader for verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing authentication systems are used, then printer supplies can be authenticated, but counterfeit replication is not sufficiently deterred
Solution Approach 1:
The patent employs dynamic rotation of the substrate containing magnetic particles to generate time-varying magnetic field measurements. The substrate rotates about an axis, allowing sensors to capture magnetic field data at multiple angular positions, creating a dynamic authentication process that is difficult to replicate statically
Solution Approach 2:
The patent adds rotational dimension to the authentication process by measuring magnetic fields at multiple angular positions around the substrate. This transforms a static 2D particle distribution problem into a 3D measurement space, significantly increasing the complexity of replication while maintaining the same physical components
2Measurement precision
If magnetic particles are used for authentication, then unique identification is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes the natural random distribution of magnetic particles within the substrate without requiring precise controlled placement. The unique authentication signature emerges from the self-organized random arrangement, eliminating the need for precision particle placement equipment while maintaining high measurement precision through rotational sampling
Solution Approach 2:
The patent replaces precision mechanical particle placement systems with magnetic field sensing and rotational measurement systems. Instead of controlling particle positions during manufacturing, the system measures the magnetic fields generated by naturally distributed particles, substituting mechanical precision requirements with electromagnetic measurement capabilities
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively deters counterfeiting by making it challenging to replicate the unique distribution and alignment of particles, ensuring the authenticity of printer supplies while maintaining low production costs.
Implementation Method 1
a non-volatile memory device mounted to the body and containing first field data corresponding to a first magnetic field generated by the magnetic particles
Data Source
AI summary
A rotating magnetic physical unclonable function (PUF) is disclosed. Rotating the PUF enables robust low cost PUF readers. PUF may be incorporated into a user-replaceable supply item for an imaging device. A PUF reader may be incorporated into an imaging device to read the PUF. Other systems and methods are disclosed.