Single-Use Transaction Key Authentication for Secure Payments

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Solution Overview

Problem

Conventional financial transactions rely on static credit/debit card numbers, which are easily stolen and manipulated, and involve complex, costly, and risky processes that only engage two active participants, lacking security and efficiency.

Innovation Solution

Implementing a system that generates a single-use, alpha-numeric transaction key for financial transactions, stored on a user's device and verified by a financial institution, eliminating the need for static card numbers and simplifying the transaction authorization process through active authentication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If static card numbers and verification codes are used for financial transactions, then the transaction process is simple and familiar, but the security is compromised as these numbers are easily stolen and manipulated

Engineering Contradiction:

Improvetransaction securityVSAvoidtransaction system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent transforms static card numbers into dynamic, single-use transaction keys that are generated for each transaction and expire after use. This dynamic approach enhances security while maintaining system manageability through automated key generation and validation processes

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The transaction key is divided into multiple portions distributed between different entities (user device, financial institution, merchant). This segmentation prevents any single party from having complete control, enhancing security while distributing system complexity across multiple manageable components

Inventive Principle:

Principle #1Segmentation

2Productivity

If conventional two-party transaction authorization is used, then the process is straightforward between merchant and bank, but intermediaries add unneeded complexity, cost, and processing time

Engineering Contradiction:

Improvetransaction processing speedVSAvoidnumber of processing systems

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent merges the authorization functions of multiple intermediaries into a single streamlined validation process where the financial institution directly verifies the transaction key with the merchant, eliminating redundant processing steps while maintaining comprehensive security checks

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent extracts and eliminates unnecessary intermediary systems from the transaction flow, creating a direct authorization path between the financial institution and merchant while retaining essential security validation functions

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If static account information is used for transactions, then the system is easy to operate with familiar card numbers, but the information can be stolen and misused

Engineering Contradiction:

Improveaccount information securityVSAvoiduser operation simplicity

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent implements single-use transaction keys that are discarded after one transaction, replacing long-lived static card numbers with short-lived dynamic credentials. This approach enhances security by preventing reuse of stolen information while maintaining operational simplicity through automated key management

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The transaction key is generated and distributed to the user device before the actual transaction occurs, allowing the user to have the key ready for immediate use. This preliminary action simplifies the transaction process while ensuring secure credentials are already in place

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12481993B2Systems and methods for performing financial transactions using active authentication

Publication Date: 2025.11.25 CAPITAL ONE SERVICES LLC

AI summary

A financial transaction method includes receiving a request to perform a financial transaction at a financial institution, generating a single-use transaction key for the financial transaction, and storing at least a first portion of the transaction key in a storage medium. The transaction key is transmitted to a user that requested the financial transaction, and an authorization request including at least a second portion of the transaction key is received from a merchant. The second portion of the transaction key received from the merchant is compared to the first portion of the transaction key to determine if the transaction should be authorized. An authorization message is transmitted to the merchant if the second portion of the transaction key received from the merchant matches the first portion of the transaction key. The financial transaction is funded from an account of the user if the financial transaction is authorized.