Biometric Capture Device Tamper Erasure via Housing Opening Detection
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Solution Overview
Problem
Biometric trait capture devices, such as signature pads, are vulnerable to unauthorized access and tampering when left unattended, risking the interception or copying of biometric data and unique keys, which can lead to improper use or security breaches.
Innovation Solution
A biometric trait capture device with a housing that automatically erases or overwrites a stored value, such as a unique key, upon opening, ensuring that the device detects unauthorized access and prevents further use until inspected and refurbished, using mechanisms like autonomous power supply interruption or magnetic erasure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the biometric trait capture device stores unique keys and biometric data in memory for authentication purposes, then the device enables secure electronic signature functionality, but the device becomes vulnerable to unauthorized access and tampering when left unattended
Solution Approach 1:
The device performs preliminary erasure of the stored value before unauthorized use can occur by detecting housing opening and automatically erasing the memory value, thereby preventing subsequent unauthorized access to biometric data and unique keys
Solution Approach 2:
The patent converts the potentially harmful situation of unauthorized access into a beneficial security feature by using the housing opening detection mechanism to trigger automatic erasure, transforming the vulnerability into an active protection system that prevents data compromise
2Reliability
If the device automatically erases stored values upon housing opening to prevent unauthorized access, then security against tampering is improved, but the device requires frequent inspection and refurbishment to restore functionality
Solution Approach 1:
The device performs self-protection by automatically detecting housing opening and erasing its own stored values without external intervention, and the system enables self-restoration through automated value rewriting when the housing is closed and power is restored, reducing manual repair requirements
3Device complexity
If the device uses autonomous power supply interruption to erase memory values upon opening, then the erasure mechanism becomes simple and reliable, but the device loses power to all components including the control unit
Solution Approach 1:
The power supply system is segmented into separate controllable sections, allowing selective power interruption only to the memory component upon housing opening detection, while the control unit and other essential components continue to receive power for maintaining system operation and detecting the opening event
Data Source
AI summary
A biometric trait capture device includes a biometric trait capture sensor contained in a housing and configured to capture biometric data, such as a handwritten signature or other biometric trait(s) of a signor, in digitized form. A memory is provided in the housing and is not electronically accessible from outside of the housing. A value, such as an encryption key, is stored in the memory. A memory-erasure device erases or overwrites the value in response to an opening of the housing, thereby providing information indicating that the biometric trait capture device has possibly been tampered with by an unauthorized person.