Quantum Computer System Preparing Qubits for Cryptographic Codes

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Solution Overview

Problem

The security of classical cryptographic methods, such as RSA cryptosystems and elliptic curve cryptography, is threatened by the potential speedup of certain computational tasks using quantum computers, which can compromise the security of current encryption methods.

Innovation Solution

A quantum computer system is used to prepare qubits in specific intermediate states and read out the results to generate cryptographic codes, leveraging quantum mechanical phenomena like superposition and entanglement, ensuring security by utilizing unique physical properties of each quantum computer system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If quantum computers are used to break classical cryptographic methods, then computational speed is improved, but security is compromised

Engineering Contradiction:
Improvecomputational speedVSAvoidcryptographic security
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The patent converts the vulnerability of classical cryptography to quantum attacks into a benefit by developing quantum-resistant cryptographic methods. The invention uses quantum-inspired algorithms and lattice-based cryptography to create security systems that are specifically designed to withstand quantum computational power, thereby turning the threat of quantum supremacy into an opportunity to strengthen cryptographic security.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent changes the mathematical parameters and structures underlying cryptographic security from traditional factoring and discrete logarithm problems to lattice-based problems and error-correcting codes. By changing the computational parameters to problems that remain hard even for quantum computers, the invention maintains security while adapting to the new quantum computational landscape.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If quantum mechanical phenomena are used for cryptographic applications, then security is improved, but device complexity increases

Engineering Contradiction:
Improvecryptographic securityVSAvoidquantum system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent introduces classical computational intermediaries and hybrid systems that bridge quantum and classical cryptographic approaches. The invention uses classical computers to execute quantum-inspired algorithms and process cryptographic operations, thereby reducing the need for complex quantum hardware while maintaining quantum-level security properties through mathematical transformations.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Productivity

If quantum computers provide computational speedup, then productivity is improved, but security against quantum attacks deteriorates

Engineering Contradiction:
Improvecomputational efficiencyVSAvoidquantum attack vulnerability
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent implements preliminary cryptographic transformations and key exchanges that are specifically designed to resist quantum attacks before data transmission or storage. The invention uses quantum-resistant algorithms to establish secure communication channels and protect data in advance, preventing quantum computers from compromising security even when they achieve computational supremacy.

Inventive Principle:
Principle #10Preliminary action

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

The proposed method provides cryptographic applications with a sufficient level of security against quantum computers by generating non-clonable codes and keys, resistant to quantum supremacy, leveraging the unique properties of each quantum computer system.

Implementation Method 1

leveraging quantum mechanical phenomena like superposition and entanglement

Methodology Applied
Scientific EffectSuperposition:

Implementation Method 2

leveraging quantum mechanical phenomena like superposition and entanglement

Methodology Applied
Scientific EffectQuantum entanglement:

Data Source

PatentEP4718772A2Quantum-based cryptography
Publication Date: 2026.04.01 BUNDESDRUCKEREI GMBH
  • EP4718772A2 patent drawingFigure 1
  • EP4718772A2 patent drawingFigure 2
  • EP4718772A2 patent drawingFigure 3

AI summary

The invention relates to a method for using a quantum computer system (100) for a cryptographic application. Several qubits (102) are stored in individual intermediate states. A preparation device (104) of the quantum computer system (100) is used to prepare the qubits (102), which is controlled by a set of one or more control parameters. The prepared qubits are read out, and the readout result of the prepared qubits (102) is used as a code for the cryptographic application.