Access Control System Using Distributed Ledger for Medical Status Validation

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Solution Overview

Problem

Existing access control systems lack the ability to evaluate a user's medical status in real-time, which is crucial for granting access to restricted spaces, especially during health crises.

Innovation Solution

An access control system that integrates sensors and an access controller with processors to evaluate a user's medical status using sensor data and credential data, allowing access only if the status meets predefined criteria, and updates records on electronic wallets and distributed ledgers accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If access control systems use traditional credential validation methods, then the system complexity remains low, but the ability to evaluate medical status in real-time is lost

Engineering Contradiction:

Improvemedical status evaluation capabilityVSAvoidsystem architecture complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system divides medical status evaluation into separate functional components: sensors for data collection, access controllers for local processing, and a distributed ledger for centralized verification. This segmentation allows each component to specialize in specific tasks, improving reliability while managing complexity through modular architecture.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A distributed ledger acts as an intermediary between the access control system and medical credential verification. It provides a centralized, immutable record of medical statuses without requiring direct connections between all system components, thereby enhancing reliability while simplifying the overall system architecture through a mediating layer.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If real-time medical status evaluation is implemented, then access safety is improved, but the time required for access validation increases

Engineering Contradiction:

Improveaccess safetyVSAvoidaccess validation time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

Medical status data is pre-verified and stored in the distributed ledger before access is needed. When a user attempts access, the system only needs to retrieve and validate pre-computed medical status information rather than performing comprehensive evaluation in real-time, thereby maintaining safety while reducing validation time.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system replaces complex real-time medical evaluation mechanisms with a distributed ledger-based verification system that validates pre-computed medical statuses. This substitution eliminates the need for lengthy real-time medical assessments while maintaining access safety through immutable, pre-verified records.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If comprehensive sensor data collection is used, then medical status evaluation accuracy is improved, but the amount of data processed increases

Engineering Contradiction:

Improvemedical status evaluation accuracyVSAvoiddata processing volume

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The system extracts only the essential medical status information needed for access validation from comprehensive sensor data. By separating critical medical status determinations from redundant sensor data, the system maintains evaluation accuracy while significantly reducing the quantity of data that needs to be processed and stored.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system transforms comprehensive sensor data into simplified medical status parameters (such as vaccinated, treated, or immune status) that are stored in the distributed ledger. This parameter transformation reduces data complexity and processing requirements while maintaining the accuracy needed for reliable access control decisions.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4050579B1Systems and methods of access validation using distributed ledger identity management

Publication Date: 2025.06.04 TYCO FIRE & SECURITY GMBH

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AI summary

An access control system includes a plurality of sensors and an access controller that includes one or more processors. The sensors detect sensor data regarding a user. The one or more processors receive credential data regarding the user from at least one of an access control device and an electronic wallet, evaluate a medical status using at least one of the sensor data and the credential data, validate access into a space responsive to the medical status being satisfied, and update a record data structure of at least one of the electronic wallet and a distributed ledger using the evaluation of the medical status.