USB Auxiliary Modem Upgrades for Secure Legacy Wireless Devices

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Solution Overview

Problem

Existing wireless communication devices lack robust security measures to prevent sensitive data from being accessed by unauthorized users, and replacing them with customized secure devices is costly and inconvenient.

Innovation Solution

An auxiliary modem and application processor are added to legacy devices via a physical link, such as USB, to enhance security by neutralizing wireless output channels and providing cryptographic and data security, while maintaining communication functionality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If auxiliary hardware is added to enhance security, then security is improved, but device complexity increases

Engineering Contradiction:

ImprovesecurityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The auxiliary modem is implemented as a USB dongle that nests within the existing device architecture, connecting through the USB port without requiring physical modification of the device housing or internal structure. This nesting approach allows security enhancement while maintaining the original device form factor and minimizing complexity increase.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The auxiliary modem acts as an intermediary component between the existing device and the network, handling cryptographic operations and secure communication protocols externally. This mediator approach isolates complex security functions from the main device, improving security without significantly increasing the perceived device complexity for end users.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If auxiliary modem is added via physical link, then security is improved, but ease of operation deteriorates

Engineering Contradiction:

ImprovesecurityVSAvoidease of operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The USB dongle utilizes the existing universal USB interface already present in modern devices, leveraging a standardized connection method that users are already familiar with from other USB devices. This universality ensures that adding the security modem does not require users to learn new connection methods or operations, maintaining ease of operation despite the added security functionality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If entire device fleet is replaced with customized secure devices, then security is improved, but loss of substance increases

Engineering Contradiction:

ImprovesecurityVSAvoidcost

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The security functionality is extracted from the main device body and placed into a separate, removable USB dongle. This extraction allows the security enhancement to be added independently without replacing the entire device, significantly reducing costs by allowing organizations to retain their existing device fleet while adding security capabilities through the attached dongles.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20250225223A1Add-on modem for wireless devices and methods useful in conjunction therewith

Publication Date: 2025.07.10 ELTA SYST LTD

AI summary

System for ex post facto upgrading of at least one Legacy personal communication device including a legacy modem and lacking at least one desired wireless communication feature, the system comprising an upgraded communication device including an auxiliary modem physically connected via an ex post facto physical connection to a Legacy personal communication device having at least one legacy wireless output channel which has been neutralized or disabled.