Phosphor-Based Card Authentication via Near-Infrared Decay
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Solution Overview
Problem
Existing card authentication methods, relying on chips and magnetic stripes, are insecure and can be easily hacked, necessitating a more robust authentication mechanism.
Innovation Solution
A system utilizing a card with infrared-blocking material and phosphor particles, coupled with a card reader that emits near-infrared light and detects changes in signal strength and phosphor particle characteristics, such as location and decay time, to authenticate cards, potentially using a private blockchain for verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chips and magnetic stripes are used for card authentication, then transaction functionality is enabled, but security is compromised as these can be easily hacked
Solution Approach 1:
The patent changes the authentication parameter from magnetic/electrical properties (magnetic stripes, chips) to optical properties (phosphor decay characteristics). By using near-infrared excitation and measuring phosphor decay times, the system creates a new authentication parameter space that is not susceptible to traditional hacking methods while maintaining functional simplicity
Solution Approach 2:
The patent replaces the mechanical/electrical reading systems (magnetic stripe readers, chip readers) with an optical detection system. The card reader uses near-infrared light sources and photodetectors to measure phosphor decay characteristics, substituting electromagnetic field-based authentication with photon-based authentication that is harder to replicate
2Reliability
If additional security measures are introduced into cards, then authentication reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the security feature directly into the card substrate by embedding phosphor particles within the card material itself. This integration eliminates the need for separate security layers or components, as the phosphor-containing material becomes both the card structure and the authentication element simultaneously
Solution Approach 2:
The patent uses phosphor materials with distinct decay time parameters as the security feature. By selecting phosphors with specific decay characteristics that can be excited by near-infrared light, the system creates a security parameter that is inherent to the material properties rather than requiring complex structural additions
3Measurement precision
If phosphor particles with unique characteristics are used, then authentication precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent measures multiple decay time parameters and combines them for authentication. By using a combination of phosphor decay characteristics rather than relying on a single precise measurement, the system achieves high authentication precision while being tolerant of manufacturing variations in phosphor particle placement and distribution
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
Provides a secure authentication method by identifying unique characteristics of phosphor particles on the card, enhancing the reliability of card authentication and preventing unauthorized access.
Implementation Method 1
each of the at least one third wavelengths being emitted by the at least one phosphor particle
Data Source
AI summary
This disclosure relates to a card having (i) an infrared-blocking material capable of blocking a plurality of near infrared wavelengths and (ii) at least one phosphor particle capable of absorbing at least one near-infrared wavelength, and a card reader capable of allowing a user to interrogate the card and determine if it is authentic, and to read information from the card. The card reader typically includes a processor configured to cause the card reader to emit at least one wavelength of light, receive at least one additional wavelength of light emitting by the at least one phosphor particle, and identify at least one characteristic of the at least one phosphor particle selected from the group consisting of a location on the card, a rise time of the phosphor, and a decay time of the phosphor.