IC Card Multi-Authentication for Quantum-Safe Compatibility

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Solution Overview

Problem

IC cards using existing cryptography are vulnerable to attacks by quantum computers and lack widespread compatibility with quantum-resistant cryptography, limiting their efficient operation and security.

Innovation Solution

An IC card system that performs multiple layers of authentication, including quantum-resistant cryptography and existing cryptography, with a function control unit that permits or limits functions based on successful authentication outcomes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If quantum-resistant cryptography is used, then security against quantum computer attacks is improved, but compatibility with existing systems and ease of operation deteriorate

Engineering Contradiction:

ImprovesecurityVSAvoidcompatibility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The authentication function is segmented into multiple independent authentication units, each handling a specific authentication method (quantum-resistant cryptography, RSA, ECC). This allows the system to offer quantum-resistant authentication while maintaining compatibility with existing systems through separate authentication pathways, resolving the contradiction between security improvement and ease of operation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The IC card is designed with multi-functionality to support multiple authentication methods simultaneously. The authentication selecting unit can choose from various authentication methods based on the situation, making the card universally compatible with both quantum-resistant systems and existing systems, thus improving both security and ease of operation

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple authentication methods are implemented, then both security and compatibility are improved, but device complexity increases

Engineering Contradiction:

Improveauthentication flexibilityVSAvoidstructure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The authentication selecting unit is configured in advance with predetermined selection criteria and authentication method configurations. This preliminary setup allows the system to automatically choose appropriate authentication methods without complex real-time decision-making, reducing operational complexity while maintaining versatility

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The authentication selecting unit acts as an intermediary between the authentication requesting unit and the various authentication units. It mediates the authentication process by selecting appropriate methods and coordinating between different authentication systems, simplifying the overall structure while enabling multiple authentication methods

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20260019269A1IC card and method of controlling IC card

Publication Date: 2026.01.15 TOPPAN HOLDINGS INC

AI summary

The present invention is an IC card including: a receiving unit that receives first information specifying first authentication using quantum-resistant cryptography or second information specifying second authentication using cryptography other than the quantum-resistant cryptography; a first authentication unit that performs the first authentication; a second authentication unit that performs the second authentication; a third authentication unit that performs third authentication; a function execution unit that executes a prescribed function; and a function control unit that permits execution of the prescribed function.