Quantum-Optical Service Modules for Quantum-Secured Optical Channels

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Solution Overview

Problem

Current encryption techniques, such as Public Key Infrastructure (PKI), are vulnerable to quantum computers, which can break mathematical functions used for key distribution, posing a threat to data security, especially with the advent of quantum computing. Existing quantum key distribution (QKD) solutions face challenges like the need for special hardware, high costs, and insider threats, and are not scalable for multi-span optical networks.

Innovation Solution

The integration of Quantum Key Distribution (QKD) into existing optical networks using Quantum-Optical Service Modules (QOSM) and trusted repeaters, which establish quantum-secured channels within the network infrastructure, allowing for secure key distribution and management without the need for special purpose hardware, and enabling secure encryption across multiple spans.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional Public Key Infrastructure (PKI) is used for encryption, then current encryption techniques can be implemented, but they are vulnerable to quantum computers that can break mathematical functions

Engineering Contradiction:

Improvesecurity against quantum threatsVSAvoidresistance to quantum computing attacks

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent replaces traditional mathematical-function-based cryptography with quantum key distribution that uses quantum mechanical properties (superposition, entanglement, no-cloning theorem) to generate and distribute cryptographic keys. This substitution makes the system fundamentally resistant to quantum computing attacks while maintaining encryption functionality.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If special purpose hardware is deployed for QKD, then quantum key distribution can be implemented, but cost and device complexity increase

Engineering Contradiction:

Improvequantum key distribution securityVSAvoidspecial purpose hardware requirements

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines quantum key distribution functionality with existing optical network infrastructure by integrating QKD modules into optical line amplifiers and network elements. This merging allows quantum security to be provided through existing hardware platforms rather than requiring completely separate special-purpose quantum hardware systems.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent makes existing optical network elements multi-functional by enabling them to perform both traditional optical signal amplification and quantum key distribution functions simultaneously. This universality allows a single piece of hardware to serve multiple purposes, reducing overall system complexity and cost.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If QKD is implemented in existing optical networks, then integration is achieved, but challenges remain with multi-span networks and insider threats

Engineering Contradiction:

Improveintegration with existing optical networksVSAvoidprotection against insider threats in multi-span networks

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces quantum-secured optical channels as intermediary communication paths within existing optical networks. These dedicated quantum channels act as mediators that provide secure key distribution between network elements while remaining isolated from the broader network infrastructure, thereby protecting against insider threats while enabling multi-span integration.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This approach provides a scalable, highly secure quantum key distribution system that integrates with existing optical networks, ensuring secure data transmission even against future quantum threats, by using existing hardware and reducing the need for separate infrastructure, thus enhancing the security and integrity of data transmission.

Implementation Method 1

each QOSM supporting Quantum Key Distribution (QKD) for establishing a quantum-secured channel

Methodology Applied

Scientific EffectQuantum Key Distribution:

Data Source

PatentUS20250106012A1Quantum key distribution in an optical network and quantum-secured optical channels

Publication Date: 2025.03.27 CIENA CORP

AI summary

Systems and methods for quantum key distribution in an optical network and quantum-secured optical channels. A node for operation in an optical network includes one or more degrees each connected to a corresponding optical span including one or more fibers; and one or more Quantum-Optical Service modules (QOSM) for each of the one or more degrees, each QOSM supporting Quantum Key Distribution (QKD) for establishing a quantum-secured channel and Optical Service Channel (OSC) functionality over the quantum-secured channel. A line amplifier system for operation in an optical network includes one or more optical amplifiers configured to amplify optical channels over an optical span in the optical network; and a trusted quantum repeater, connected to the optical span, and configured to support QKD for establishing a first quantum-secured channel and a second quantum-secured channel and OSC functionality over the first quantum-secured channel and the second quantum-secured channel.