Local Transaction Architecture for Secure Device Discovery

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Solution Overview

Problem

Existing electronic payment transaction platforms face challenges in conducting transient-type transactions among proximally located computing devices while minimizing the exchange of personally identifiable or persistent data.

Innovation Solution

A local transaction architecture is implemented, utilizing a transaction coordinator system that generates and maps proxy user discovery identifiers on a session-by-session or time-limited basis, allowing for short-range electronic payment transactions without the need for sharing persistent identifiers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If persistent user identifiers are shared among proximally located devices for electronic payment transactions, then transaction reliability is improved, but user privacy and security deteriorate due to exposure of personally identifiable information

Engineering Contradiction:

Improvetransaction reliabilityVSAvoidexposure of personally identifiable information

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a transaction coordinator system as an intermediary that mediates between user devices and the transaction network. This coordinator assigns temporary proxy identifiers to users during transactions, preventing direct exposure of persistent user identifiers while maintaining transaction reliability through centralized coordination and validation

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent employs temporary proxy identifiers that are short-lived and disposable, valid only for specific transaction sessions. These temporary identifiers replace persistent user identifiers, allowing transactions to proceed reliably while the temporary nature of the identifiers prevents long-term privacy violations and unauthorized tracking

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Object-affected harmful factors

If temporary proxy identifiers are used for transient-type transactions, then user privacy is protected, but transaction verification complexity increases

Engineering Contradiction:

Improveunauthorized data harvestingVSAvoidtransaction verification complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The transaction coordinator system performs preliminary actions by pre-assigning and validating temporary proxy identifiers before transactions occur. This preliminary setup includes registering the temporary identifiers, establishing their validity periods, and pre-configuring the verification rules, which simplifies the actual transaction verification process

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback mechanisms where the transaction coordinator continuously monitors and validates temporary identifiers during transactions. The coordinator provides real-time verification feedback to participating devices, confirming whether temporary identifiers are valid and authorized, thereby managing verification complexity through centralized control

Inventive Principle:

Principle #23Feedback

3Object-affected harmful factors

If session-by-session identifier mapping is implemented, then data security is improved by limiting data retention, but system operation time increases due to repeated authentication processes

Engineering Contradiction:

Improvedata retention risksVSAvoidauthentication time

Core Design Contradiction:

Object-affected harmful factorsVSLoss of time

Solution Approach 1:

The patent applies partial action by implementing identifier mapping only for the specific duration and scope of each transaction session, rather than maintaining continuous or excessive mapping. The temporary identifiers are valid only for the necessary time period, automatically expiring afterward, thus limiting data retention risks without requiring perpetual authentication

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20250139623A1Device and method of device discovery for transactions among client devices based on a local transaction architecture

Publication Date: 2025.05.01 INTERAC CORP

AI summary

A device comprising a communication circuit; a processor, and a memory coupled to the processor. The memory stores processor-executable instructions that configure the processor to: receive verification of a signed transaction coordinator authentication token, the received verification comprising initialization data including a first proxy user discovery identifier associated with a user transaction identifier and a first alias identifier; receive input representing a request to alter the first alias identifier to a second alias identifier; transmit a signal representing the request to alter the first alias identifier; receive, from the transaction coordinator system, a second proxy user discovery identifier associated with the user transaction identifier and the second alias identifier for the downstream short-range transfer data process; and communicate a discovery packet via a short-range network, the discovery packet including the second proxy user discovery identifier and a data flag indicating that the discovery packet includes discovery data.