Biosignal Data Encryption via Symmetric Key Exchange

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Solution Overview

Problem

Existing biosignal data management systems face security vulnerabilities due to unsecured transmission and low-speed wireless communication constraints, which expose data to interception and leakage, and rely on insecure wired paths for faster data extraction.

Innovation Solution

A method employing a symmetric key exchange to generate encryption and decryption keys based on public and secret information of connected devices, ensuring secure data protection by encrypting biosignal data and specifying secret information through identification information, using a key management unit and information management system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If low-speed wireless communication (BLE) is used for biosignal data transmission, then power consumption is reduced, but data extraction time increases significantly

Engineering Contradiction:

Improvepower consumptionVSAvoiddata extraction time

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The patent segments the data transmission process into two distinct phases: a setup phase where encryption keys and security parameters are exchanged over the low-speed wireless connection, and a data transfer phase where encrypted biosignal data is transmitted. This segmentation allows the system to benefit from power-efficient wireless communication while maintaining data security, as the encryption overhead is minimal compared to the actual data transfer volume.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary actions by establishing encryption keys and security parameters before actual biosignal data transmission. The key management unit generates and exchanges encryption keys during an initial connection phase, so that when data needs to be transmitted, the security framework is already in place. This preliminary key exchange enables fast, secure data transfer without repeated authentication overhead.

Inventive Principle:

Principle #10Preliminary action

2Speed

If wired path is used for fast biosignal data extraction, then data transmission speed is improved, but security vulnerability increases due to unsecured transmission

Engineering Contradiction:

Improvedata transmission speedVSAvoiddata security

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The patent introduces encryption as an intermediary layer between the data source and the transmission channel. The key management unit acts as a mediator that transforms plaintext biosignal data into encrypted form using symmetric keys. This intermediary encryption layer protects the data even when transmitted over unsecured wired paths, as the data appears as random ciphertext to potential interceptors without the proper decryption keys.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the state of the data from plaintext to encrypted text by applying cryptographic transformations. The key management unit modifies the data parameters through encryption algorithms, changing the representational form of the biosignal data. This parameter change ensures that even if data is intercepted during fast wired transmission, it remains incomprehensible without the corresponding decryption keys.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If biosignal data is transmitted without separate processing, then system complexity is reduced, but data exposure risk increases during interception or leakage

Engineering Contradiction:

Improvesystem complexityVSAvoiddata exposure risk

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the security management functionality into a separate key management unit that operates independently from the main biosignal processing chain. This extracted key management component handles encryption and decryption operations separately, allowing the core biosignal processing to remain simple while adding security where needed. The key management unit is a distinct module that can be integrated without fundamentally redesigning the entire system.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20230385402A1Method, system and non-transitory computer-readable recording medium for managing bio-signal data

Publication Date: 2023.11.30 HUINNO

AI summary

A method for managing biosignal data is provided. The method includes the steps of: generating an encryption key for encrypting biosignal data associated with a second device, with reference to first public information determined on the basis of secret information of a first device, and secret information of the second device; and providing second public information determined on the basis of the secret information of the second device, and the biosignal data encrypted on the basis of the encryption key to the first device.