Quantum Key Distribution for Blockchain Data Encryption

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Solution Overview

Problem

As quantum computing advances, traditional encryption methods in blockchain are at risk of compromise, necessitating improved security measures to protect data from unauthorized access and decryption.

Innovation Solution

Implementing quantum key distribution (QKD) to generate encryption keys for data stored in blockchains, combined with quantum secret sharing to split these keys into shares requiring multiple authorizations for decryption, ensuring only authorized parties can access the data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional encryption methods are used in blockchain, then data can be easily accessible for authorized parties, but security is at risk of compromise as quantum computing advances

Engineering Contradiction:

ImprovesecurityVSAvoidquantum computing threats

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the cryptographic parameter from classical encryption algorithms to quantum-resistant encryption algorithms that can withstand attacks from quantum computers, thereby maintaining security reliability against emerging computational threats

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent substitutes classical cryptographic mechanisms with quantum key distribution (QKD) mechanisms that use quantum mechanical principles to generate and distribute encryption keys, providing security that is fundamentally resistant to quantum computing attacks

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If quantum key distribution is implemented, then security against quantum threats is improved, but system complexity increases

Engineering Contradiction:

Improvequantum-resistant securityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the quantum security implementation into separate functional modules: quantum key distribution for key generation, quantum-resistant encryption for data protection, and quantum secret sharing for key management. This modular segmentation reduces overall system complexity by allowing each component to be developed and maintained independently

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces quantum secret sharing as an intermediary mechanism that distributes quantum encryption keys across multiple parties, enabling secure key management without requiring a single point of control, thereby reducing system complexity through distributed architecture

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If quantum secret sharing is used to split encryption keys, then security is enhanced through multiple authorizations, but accessibility of data becomes more restricted

Engineering Contradiction:

Improvesecurity through key sharingVSAvoiddata accessibility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent segments the encryption key into multiple shares distributed to different authorized parties. Each party holds a portion of the key, and a threshold number of shares are required to reconstruct the full key, thereby enhancing security while maintaining controlled accessibility

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic key sharing where the threshold for key reconstruction can be adjusted based on security requirements and operational needs, allowing the system to balance security enhancement with data accessibility flexibility

Inventive Principle:

Principle #15Dynamics

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

Provides enhanced security against advanced computing threats by making data publicly accessible yet practically impossible to decrypt without proper authorization, maintaining data integrity and confidentiality.

Implementation Method 1

generating, by a processor of the computing device, a second cryptographic key over the first communication channel using quantum key distribution

Methodology Applied

Scientific EffectQuantum key distribution:

Data Source

PatentUS12457100B2Method and system for quantum key distribution (QKD) within blockchain platforms

Publication Date: 2025.10.28 MASTERCARD INT INC

AI summary

A method for improved security in blockchains using quantum key distribution includes: storing a first cryptographic key; establishing a first communication channel with an external device; generating a second cryptographic key over the first communication channel using quantum key distribution; encrypting a data set using the second cryptographic key; generating a blockchain data entry including at least the encrypted data set; and transmitting the blockchain data entry to a blockchain node in a blockchain network causing the blockchain node to verify the blockchain data entry and add the blockchain data entry into a new block added to a blockchain associated with the blockchain network.