Biometric Card Authentication Circuit for Secure Magnetic Field Generation
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Solution Overview
Problem
Existing information storage devices, such as credit cards, face challenges in securely and efficiently transmitting account information due to the persistence of magnetic fields, which can lead to unauthorized use if the card is lost or stolen.
Innovation Solution
An apparatus that includes a display, memory for storing biometric and account information, a biometric sensor, authentication circuitry, display circuitry, selection circuitry, and a field generator that outputs a magnetic field representing account information only after successful biometric authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If magnetic fields are used to store account information persistently, then information storage durability is improved, but security against unauthorized use deteriorates
Solution Approach 1:
The system performs biometric authentication before making account information accessible. The magnetic field storage is prepared in advance but remains locked until biometric verification occurs, preventing unauthorized access while maintaining persistent storage capability
Solution Approach 2:
Biometric authentication acts as an intermediary between the stored magnetic field information and external access. The biometric data serves as a mediator that must be verified before the magnetic field information can be read or used, adding a security layer without affecting storage durability
2Reliability
If biometric authentication is added to verify identity, then security is improved, but device complexity increases
Solution Approach 1:
The biometric sensor, authentication circuitry, and magnetic field generator are merged into an integrated card system. This consolidation adds security functionality while minimizing the increase in overall device complexity by combining multiple components into a single portable unit
Solution Approach 2:
The card system performs multiple functions: biometric sensing, authentication processing, magnetic field generation, and information storage. This multi-functionality allows a single device to provide both security verification and information transmission capabilities without requiring separate systems
3Reliability
If account information is made accessible only after authentication, then security is improved, but operation time increases
Solution Approach 1:
The system uses periodic or pulsed magnetic field generation rather than continuous output. The magnetic field is generated in brief intervals during authentication and data transmission, reducing the time the system remains in an active state while ensuring security requirements are met
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
This solution enhances security by ensuring that account information is only accessible and transmitted after valid biometric authentication, thereby reducing the risk of unauthorized use.
Implementation Method 1
a biometric sensor that senses biometric information
Implementation Method 2
a field generator that generates an output session that outputs at least one magnetic field that represents account information
Data Source
AI summary
A method can include sensing biometric information of an individual using a sensor of a card; authenticating the sensed biometric information by comparing the sensed biometric to stored biometric information in memory of the card; responsive to the authenticating, decrypting an encrypted version of a private key stored in the memory of the card; generating a digitally signed message using the private key and circuitry of the card, where the digitally signed message provides for proof of possession of the private key and specifies an amount of digital cryptocurrency for a transaction to transfer ownership of the amount of digital currency to an address of a payee, and where the address of the payee is an encoding of a public key; and transmitting the digitally signed message via an interface of the card.