QR Wallet Transactions With Suspicious Code Flagging

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Solution Overview

Problem

Cash-based transactions lack convenience and anonymity, preventing remote purchases and exposing users to security risks, while existing digital solutions like Bitcoin are volatile and unsuitable for everyday use.

Innovation Solution

A digital+bitcoin (d+b) wallet system that enables anonymous transactions using QR codes and biometric authentication, integrating with a partner cryptocurrency provider to facilitate secure and anonymous purchases.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If cash-based transactions are used, then anonymity is provided, but convenience and security are compromised due to the need to carry cash and inability to transact remotely

Engineering Contradiction:

ImproveanonymityVSAvoidconvenience

Core Design Contradiction:

Loss of informationVSEase of operation

Solution Approach 1:

The patent introduces a digital wallet system as an intermediary between cash and traditional digital payments. The wallet uses QR codes as a mediator to enable anonymous transactions without requiring physical cash handling, thus maintaining anonymity while improving convenience and enabling remote transactions.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the mechanical system of physical cash handling with a digital system using QR codes and mobile devices. This substitution eliminates the need to carry physical cash while maintaining transaction anonymity, resolving the contradiction between anonymity and convenience.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Loss of information

If cash-based transactions are used, then anonymity is provided, but security risks increase due to the need to carry cash at all times

Engineering Contradiction:

ImproveanonymityVSAvoidsecurity

Core Design Contradiction:

Loss of informationVSReliability

Solution Approach 1:

The digital wallet system acts as a secure intermediary, storing value digitally rather than requiring physical cash to be carried. The system uses biometric authentication and encrypted storage to protect user funds, maintaining anonymity while significantly improving security.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent creates a digital copy of cash functionality through QR codes that represent value. Instead of handling physical cash, users interact with digital representations that can be securely stored and transferred, eliminating security risks associated with carrying cash while preserving anonymity.

Inventive Principle:

Principle #26Copying

3Loss of information

If Bitcoin is used for transactions, then anonymity is provided, but volatility makes it unsuitable for everyday use

Engineering Contradiction:

ImproveanonymityVSAvoidvalue stability

Core Design Contradiction:

Loss of informationVSStability of the object's composition

Solution Approach 1:

The digital wallet system introduces a stablecoin mechanism as an intermediary layer between volatile cryptocurrencies like Bitcoin and everyday transactions. The stablecoin is pegged to a stable asset, providing price stability while maintaining the anonymity features of cryptocurrency transactions.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the value parameter of the cryptocurrency by using stablecoins with pegged values instead of volatile cryptocurrencies. This parameter change maintains the anonymity benefit while eliminating the volatility issue, making the system suitable for everyday transactions.

Inventive Principle:

Principle #35Parameter changes

4Ease of operation

If traditional digital payment systems are used, then convenience is improved, but anonymity is lost

Engineering Contradiction:

ImproveconvenienceVSAvoidanonymity

Core Design Contradiction:

Ease of operationVSLoss of information

Solution Approach 1:

The patent uses QR codes as an intermediary that enables digital payment convenience while preserving anonymity. The QR code system does not require sharing personal information or account details between parties, thus maintaining privacy while providing the convenience of digital transactions.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent creates a privacy-preserving copy of the traditional digital payment experience. Instead of using systems that require personal information exchange, the QR code system replicates the convenience of digital payments while copying only the essential transaction data, thereby maintaining anonymity.

Inventive Principle:

Principle #26Copying

Data Source

PatentUS12536541B2Virtual cash with flagging or tracking of suspicious transactions

Publication Date: 2026.01.27 BANK OF AMERICA CORP

AI summary

A method for transferring a good or service from a d+b wallet-supporting vendor to a user registered with a digital+bitcoin (d+b) wallet is provided. The user may be registered with a cryptocurrency provider and a value allocation. The method may receive, at the vendor, a user request configured for a cryptocurrency-based transaction. The method may transmit, a consent to transact the cryptocurrency-based transaction and, in response to the transmitting of the consent to transact, receive, from the user device, a Quick Response (QR) code. The code specifies: a) an amount of cryptocurrency; and b) a product or a service to be exchanged for the amount of cryptocurrency. Prior to transferring the value, the method may flag the transfer of the value as suspicious when the QR code received by the user has been identified as a fraudulent QR code. The flagging may terminate the transfer.