Optical Intrusion Detection via Light Intensity Variation

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Solution Overview

Problem

Existing security measures for electronic devices, such as payment terminals, are inadequate in detecting and preventing intrusion attempts by spy elements, which become increasingly discreet and resilient to climatic constraints, leading to data compromise.

Innovation Solution

A system utilizing optical sensors connected to a security module to detect variations in light intensity caused by intrusions, with random signal transmission to enhance detection accuracy and prevent false alarms, implemented in conjunction with existing or added light sources within the device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If optical sensors and light sources are added to detect intrusion, then security detection capability is improved, but device complexity increases

Engineering Contradiction:

Improveintrusion detection capabilityVSAvoidsystem architecture complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent reuses existing light sources already present in the electronic device for dual purposes: their original function (e.g., backlighting) and a new security function (illumination for intrusion detection). This eliminates the need to add dedicated light sources, thereby improving security capability without increasing device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system uses the device's own existing components (light sources and optical sensors) to perform security detection, rather than requiring entirely separate detection systems. The light sources serve themselves by providing illumination for both their original purpose and security monitoring, reducing overall system complexity.

Inventive Principle:

Principle #25Self-service

2Reliability

If dummy keys with permanent pressure are added to detect keypad removal, then security detection is improved, but mechanical structure rigidity increases

Engineering Contradiction:

Improvekeypad removal detectionVSAvoidmechanical structure rigidity

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent replaces mechanical detection methods (dummy keys with permanent pressure) with an optical detection system. Instead of using mechanical pressure to detect intrusion, the system uses optical sensors to detect changes in light intensity caused by intrusions, thereby avoiding the need for rigid mechanical structures while improving security detection.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If spy elements are made smaller and insertion more discreet, then ease of insertion is improved, but detection difficulty increases

Engineering Contradiction:

Improveease of spy element insertionVSAvoidintrusion detection difficulty

Core Design Contradiction:

Ease of operationVSDifficulty of detecting and measuring

Solution Approach 1:

The patent extracts the detection function from physical contact with the intrusion object (spy element). Instead of requiring direct contact or interaction with the inserted element, the optical sensor detects the presence of the intrusion through light intensity changes caused by the intrusion's effect on light propagation, making detection independent of the spy element's size or insertion method.

Inventive Principle:

Principle #2Taking out (Extraction)

4Reliability

If detection modules are added to keypad architecture, then intrusion detection capability is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveintrusion detection capabilityVSAvoidkeypad manufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent makes existing components serve multiple functions. Light sources originally designed for backlighting are reused for security detection, and optical sensors are integrated into the existing display structure. This approach allows intrusion detection capability to be added without requiring separate dedicated detection modules, thereby simplifying manufacturing.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Effectively detects and alerts against intrusions, such as modifications to the light guide or addition of read heads, without requiring major architectural changes or sensitive components, thus enhancing security while minimizing costs and false alerts.

Implementation Method 1

at least one optical sensor connected to at least one security module of the electronic device, the optical sensor and the security module being configured to detect a variation in light intensity measured by the optical sensor

Methodology Applied

Scientific EffectLight intensity detection: Photoelectric Effect

Data Source

PatentUS10248941B2System and method for the optical detection of intrusion, and corresponding electronic device, program and recording medium

Publication Date: 2019.04.02 BANKS & ACQUIRERS INT HLDG SAS

AI summary

A system for detecting an intrusion in an electronic device. The system includes at least one optical sensor connected to at least one security module of the electronic device. The optical sensor and the security module are configured to detect a variation in light intensity measured by the optical sensor as compared with a reference light intensity associated with at least one pre-determined light source inside the electronic device. The variation in light intensity represents a risk of intrusion into the electronic device.