Contactless Card Cryptographic Authentication for Secure Retail Transactions

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Solution Overview

Problem

Current cryptographic authentication methods for contactless cards in retail settings are vulnerable to attacks and do not adequately secure data transmission, leading to compromised transaction integrity and security.

Innovation Solution

A system and method for cryptographic authentication of contactless cards, involving a contactless card with a processor, memory, and applet, and an authentication server, which uses near-field communication to authenticate transactions and manage inventory, ensuring secure data transmission and transaction integrity through key diversification and encryption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cryptographic authentication methods are used for contactless cards, then transaction security is improved, but system complexity increases

Engineering Contradiction:

Improvetransaction securityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The authentication system is segmented into distinct functional modules: contactless card with applet, authentication server, inventory management devices, and point of sale devices. Each component handles specific cryptographic tasks independently, reducing overall system complexity while maintaining security.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

An authentication server acts as an intermediary between the contactless card and other system components. It manages cryptographic keys and authentication processes centrally, simplifying the complexity distribution across the system while ensuring transaction security.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If cryptographic authentication is implemented, then data transmission security is improved, but processing time increases

Engineering Contradiction:

Improvedata transmission securityVSAvoidprocessing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

Cryptographic keys and authentication credentials are pre-configured in the contactless card applet and authentication server before transactions occur. This preliminary setup enables rapid authentication during actual transactions without real-time key generation or complex computations.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Complex cryptographic verification processes are replaced with simplified token-based authentication mechanisms. The system uses pre-computed authentication tokens and messages that can be verified quickly without extensive computational overhead, reducing processing time while maintaining security.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If contactless communication with multiple devices is enabled, then retail process efficiency is improved, but vulnerability to attacks increases

Engineering Contradiction:

Improveretail process efficiencyVSAvoidvulnerability to attacks

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system dynamically adapts authentication requirements based on the specific interaction context. Different cryptographic protocols and security levels are applied depending on whether the contactless card is communicating with inventory management devices or point of sale devices, optimizing both efficiency and security for each scenario.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes cryptographic parameters such as token types, authentication message formats, and verification methods based on the communicating device type. This parameter adaptation allows efficient processing for each device while maintaining appropriate security measures specific to each communication context.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances the security and efficiency of retail transactions by providing secure authentication and data transmission, reducing the risk of unauthorized access and ensuring accurate inventory management and cost determination.

Implementation Method 1

Methodology Applied

Scientific EffectNear-field communication: Electromagnetic Induction

Data Source

PatentUS20240396734A1Systems and methods for inventory management using cryptographic authentication of contactless cards

Publication Date: 2024.11.28 CAPITAL ONE SERVICES LLC

AI summary

Example embodiments of systems and methods for data transmission system between transmitting and receiving devices for use in a tap and walk store are provided. In an example embodiment, the transmitting device can generate a diversified key using the master key, protect a counter value and encrypt data prior to transmitting to the receiving device, which can generate the diversified key based on the master key and can decrypt the data and validate the protected counter value using the diversified key. Disclosed systems allow a user to purchase items utilizing the disclosed transmitting device.