Smoking Substitute Firmware Updates Using Device-Specific Encryption

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Solution Overview

Problem

Current smoking substitute devices lack secure and efficient methods for firmware updates and management, limiting their functionality and exposing potential security risks.

Innovation Solution

A system and method for securely updating firmware on smoking substitute devices using device-specific encryption keys, ensuring only authorized devices can decrypt and apply updates, while maintaining a streamlined process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If device-specific encryption keys are used for firmware updates, then security is improved, but device complexity increases

Engineering Contradiction:

ImprovesecurityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The encryption key management is segmented by assigning unique device-specific encryption keys to each smoking substitute device. This segmentation ensures that each device can securely decrypt firmware updates intended for it, improving security while the key distribution and management are handled separately through the server system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A server system acts as an intermediary between the firmware update source and the smoking substitute devices. The server handles the complex tasks of encrypting firmware updates with device-specific keys, managing key distribution, and coordinating the update process, thereby reducing the complexity burden on individual devices.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If secure firmware update methods are implemented, then reliability is improved, but ease of operation deteriorates

Engineering Contradiction:

ImprovereliabilityVSAvoidease of operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The smoking substitute devices perform self-service by automatically detecting available firmware updates, decrypting them using their stored device-specific encryption keys, and applying the updates without user intervention. This maintains ease of operation while ensuring reliable secure updates.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system implements feedback mechanisms where devices report their firmware version status to the server, which then determines whether updates are needed and initiates the update process. This automated feedback loop ensures reliable updates while keeping the user experience simple.

Inventive Principle:

Principle #23Feedback

3Reliability

If device-specific encryption keys are stored in memory, then security is improved, but loss of information risk increases

Engineering Contradiction:

ImprovesecurityVSAvoidloss of information risk

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

Device-specific encryption keys are stored in secure memory regions of the smoking substitute devices, protected against unauthorized access and data loss. This beforehand protection ensures that even if the device is lost or damaged, the keys remain secure, maintaining the integrity of the firmware update system.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS12495838B2Smoking substitute devices and associated methods, systems and apparatuses

Publication Date: 2025.12.16 IMPERIAL TOBACCO LTD

AI summary

A system for managing a smoking substitute device, the system comprising; a smoking substitute device comprising; a control unit; a memory configured to store firmware for operating the smoking substitute device and a device-specific encryption key; and a communications interface; and an application server configured to communicate to the smoking substitute device a firmware update message that is encrypted with the device-specific encryption key, wherein the smoking substitute device is configured to obtain an encrypted firmware image, wherein the firmware update message includes a firmware key for decrypting the encrypted firmware image, and wherein the smoking substitute device is configured to use the device-specific encryption key to decrypt the firmware update message, to obtain the firmware key for decrypting the encrypted firmware image.