Payment Card Keypad for Transaction Amount Verification

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Solution Overview

Problem

Current payment card transactions are vulnerable to fraud, particularly at Point of Sale (POS) terminals, where cardholders may not verify the transaction amount entered by merchants, leading to potential misuse and unauthorized transactions.

Innovation Solution

Incorporating a keypad on the payment card that allows customers to input their Personal Identification Number (PIN) and customer transaction amount, which is then verified against a stored PIN, ensuring that the merchant transaction amount conforms to the customer-set limit before facilitating the payment transaction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a keypad is added to the payment card for customer input of PIN and transaction amount, then transaction security is improved, but device complexity increases

Engineering Contradiction:

Improvetransaction securityVSAvoidpayment card structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the keypad, display, and cardholder interaction interface directly into the payment card itself, creating an integrated security device. This combination allows the card to independently verify transaction amounts and PINs without requiring separate verification devices, thereby improving security while keeping the overall system compact.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The payment card enables the cardholder to independently input and verify transaction details through its built-in keypad and display. The cardholder can enter the expected transaction amount and compare it with the amount displayed by the terminal, providing self-service verification that enhances security without requiring additional external verification systems.

Inventive Principle:

Principle #25Self-service

2Reliability

If the customer is required to verify the transaction amount through the payment card keypad, then fraud prevention is improved, but ease of operation deteriorates

Engineering Contradiction:

Improvefraud preventionVSAvoidtransaction process

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system performs preliminary verification by allowing the cardholder to input the expected transaction amount before the actual transaction is authorized. The terminal then displays this pre-entered amount for confirmation, enabling the cardholder to detect and prevent fraudulent transactions before they are completed, thus improving fraud prevention while maintaining a streamlined process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The payment terminal provides immediate visual feedback by displaying the transaction amount on its screen for the cardholder to verify against the amount they entered via the payment card keypad. This real-time feedback mechanism allows the cardholder to confirm or reject the transaction based on the displayed information, making the verification process intuitive and easy to operate.

Inventive Principle:

Principle #23Feedback

3Reliability

If the payment card requires both PIN verification and transaction amount confirmation, then transaction authorization reliability is improved, but transaction processing time increases

Engineering Contradiction:

Improveauthorization reliabilityVSAvoidtransaction processing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system maintains continuous verification throughout the transaction process by seamlessly integrating PIN entry and transaction amount confirmation into a single uninterrupted flow. The cardholder enters their PIN and the expected transaction amount in sequence without breaking the authentication chain, allowing the system to process both verifications efficiently while maintaining high authorization reliability.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The cardholder enters the expected transaction amount in advance via the payment card keypad before the terminal processes the actual transaction. This preliminary input allows the system to pre-verify the amount against the terminal's displayed amount, enabling faster authorization decisions and reducing overall processing time while maintaining strict security checks.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11568194B2Payment transaction methods and systems enabling verification of payment amount by payment card

Publication Date: 2023.01.31 MASTERCARD INT INC

AI summary

Embodiments provide a method of facilitating a payment transaction with a payment card of a customer. The method includes receiving a payment transaction request initiated at a merchant terminal. The payment transaction request comprising at least a merchant transaction amount associated with a purchase entered at a merchant terminal, a PIN of the payment card provided by the customer via a keypad and a customer transaction amount provided by the customer via the keypad. The method includes facilitating verification of facilitating verification of the PIN with a stored PIN. The method further includes, upon successful verification, determining whether the merchant transaction amount conforms to the customer transaction amount. The method further includes facilitating a payment transaction associated with the payment transaction request if the merchant transaction amount conforms to the customer transaction amount.