Code Image Payment Flow With Post-Use Data Deletion

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Solution Overview

Problem

Existing mobile and electronic payment systems lack a secure and efficient method for processing payments using code images, particularly in offline scenarios, and there is a need for improved user interface feedback regarding payment processing.

Innovation Solution

A terminal device equipped with a communication interface, storage, and a processor that receives, stores, and processes payment information using a code image, while providing visual feedback indicating the absence of stored information post-processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If payment information is stored in the terminal storage, then payment processing efficiency is improved, but security risk increases

Engineering Contradiction:

Improvepayment processing efficiencyVSAvoidsecurity risk

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent extracts the sensitive payment information from the terminal storage after it has been used for payment processing. The code image is generated, displayed, and then deleted from the terminal, removing the security risk while maintaining the ability to process payments efficiently when needed

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent performs preliminary action by generating and displaying the code image before any potential security breach can occur. The code is prepared in advance for payment processing, then immediately removed, ensuring efficiency without prolonged exposure of sensitive data

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If code image is displayed continuously, then user convenience is improved, but security vulnerability increases

Engineering Contradiction:

Improveuser convenienceVSAvoidsecurity vulnerability

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent implements periodic action by displaying the code image only for the specific duration needed for payment processing, then automatically deleting it. This periodic display ensures user convenience during the payment moment while minimizing security vulnerability by not maintaining continuous display

Inventive Principle:

Principle #19Periodic action

3Reliability

If payment information is deleted after processing, then security is improved, but user awareness of payment status is reduced

Engineering Contradiction:

ImprovesecurityVSAvoidpayment status information

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent introduces feedback by providing visual confirmation to the user that the code image has been successfully deleted after payment processing. This feedback mechanism maintains security through deletion while compensating for the loss of information by explicitly informing the user of the payment status and code removal

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12524754B2Information processing method, program, and terminal

Publication Date: 2026.01.13 LINE FINANCIAL CORP

AI summary

An information processing method and a terminal for processing information are provided. The information processing method includes: receiving, by the terminal from a server, first information for making a payment using a code image; storing the first information in a storage of the terminal; displaying, by a display of the terminal, the code image based on the first information; processing, by the terminal, the payment based on the displaying of the code image; and displaying, by the display, second information based on the processing of the payment, the second information indicating the first information is not stored in the storage.