Tamper-Evident Lock Backplate Sensing for Unauthorized Access Detection

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Solution Overview

Problem

Existing lock systems in media terminals are vulnerable to tampering by unauthorized personnel who remove the lock backplate to gain unauthorized access, which goes undetected by current security measures.

Innovation Solution

A lock apparatus with a contact sensor that detects separation of the lock backplate from the lock body and reports a tampering event, combined with firmware that logs and reports such events, especially upon power restoration, ensuring unauthorized access is detected.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a contact sensor is added to detect backplate separation, then security against tampering is improved, but device complexity increases

Engineering Contradiction:

Improvesecurity against tamperingVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

A contact sensor is introduced as an intermediary component between the lock backplate and the lock body. The sensor detects when the backplate is removed or separated from the lock body and triggers an alarm signal, providing tamper detection capability without fundamentally redesigning the lock mechanism itself.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The contact sensor provides immediate feedback when tampering occurs by detecting the separation between the backplate and lock body. This feedback mechanism triggers an alarm signal that is sent to a remote monitoring system or security personnel, enabling real-time response to unauthorized access attempts.

Inventive Principle:

Principle #23Feedback

2Reliability

If security monitoring is enhanced to detect backplate removal, then unauthorized access prevention is improved, but ease of operation deteriorates

Engineering Contradiction:

Improveunauthorized access preventionVSAvoidease of operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The contact sensor is pre-installed and configured within the lock assembly before deployment. The sensor is positioned to automatically detect backplate separation without requiring additional setup or configuration at the time of use, allowing authorized personnel to operate the lock normally while security monitoring is already active.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the lock system includes tamper detection capabilities, then security detection is improved, but manufacturing cost increases

Engineering Contradiction:

Improvesecurity detectionVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The contact sensor serves as a relatively simple intermediary component that can be integrated into the existing lock assembly. By using a straightforward sensing mechanism rather than a complex detection system, the manufacturing cost is kept manageable while still providing effective tamper detection capability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250215727A1Lock with tamper-evident security

Publication Date: 2025.07.03 NCR ATLEOS CORP

AI summary

A safe with lock tampering capabilities is provided. A lock apparatus includes a lock body, a lock backplate, a lock, and a sensor. The sensor raises an event when a first end and/or a send end of the sensor loses contact with a surface of the lock body and/or a surface of the lock backplate. The event is reported by the safe as a lock tampering event. Whenever the safe loses power and is subsequently restored power, the safe reports a lock tampering event.