量子鍵配送(QKD)プラットフォームを実現する量子暗号通信技術

李天秀 Li Tianxiu, Lei Shi, 李佳豪 Li Jiahao +1 more

Yoko Hasebe

English Abstract This technical specification and position paper defines the architectural framework, cryptographic primitives, and implementation roadmap for Decentralized Autonomous Sensing (DAS) systems operating within quantum-threatened environments. As quantum computing advances toward fault-tolerant regimes, classical cryptographic protocols ensuring the integrity of distributed physical sensing and critical cyber-physical infrastructure face systemic vulnerabilities. This paper introduces a unified tripartite defense architecture integrating Post-Quantum Cryptography (PQC), Quantum Key Distribution (QKD), and advanced AI inference models via the Dynamic Real-Time Optimization Engine (DRT-O-E). We outline a deterministic 2026–2030 implementation roadmap, progressing from Proof-of-Concept (PoC) integration of multimodal telemetry processing to self-evolving Quantum Smart Contracts (QSC) verified via formal methods, culminating in a global, physical-layer deterministic interlock network. Standardized cryptographic formulations, hardware-enforced root-of-trust mechanisms, and open governance protocols are detailed to establish a resilient, nation-state-grade defense matrix for critical infrastructure. 要旨(Japanese Abstract) 本学術技術仕様書およびポジションペーパーは、量子脅威下で動作する自律型分散ネットワーク(Decentralized Autonomous Sensing: DAS)のアーキテクチャ・フレームワーク、暗号プリミティブ、および実装ロードマップを定義するものである。耐障害性量子コンピュータの実現が近づくにつれ、分散型物理センシングおよび重要サイバー物理インフラを保護する従来の暗号プロトコルは構造的脆弱性に直面している。本稿では、耐量子計算機暗号(PQC)、量子鍵配送(QKD)、および動的リアルタイム最適化エンジン(DRT-O-E)による最先端AI推論モデルを統合した三位一体型防御アーキテクチャを提案する。マルチモーダル・テレメトリ処理のPoC検証(2026年)、形式検証済みの自律進化型量子スマートコントラクト(QSC)(2028年)、そして物理層確定的インターロックに基づく大域的DASネットワークの実現(2030年)に至る、確定的な2026–2030年実装ロードマップを策定した。また、国家インフラレベルの回復力を確立するため、標準化暗号数式、ハードウェア・トラストアンカー、およびオープンガバナンス・フレームワークの技術仕様を詳述する。

利守 本庄, 康弘 都倉

Yuan Cao, Yongli Zhao, Jianquan Wang +3 more

Quantum key distribution (QKD) holds the potential of providing long-term integrity and confidentiality for data and communications. Currently, many fiber-based QKD systems have been commercialized and several QKD networks have been deployed. Given the high cost and complexity of QKD network deployment, QKD as a service (QaaS) becomes a promising pattern for future QKD networks. The QaaS concept is that multiple users can apply for QKD services to obtain their required secret-key rates (SKRs) from the same QKD network infrastructure instead of deploying their dedicated QKD networks. Accordingly, how to provide efficient and flexible QaaS for fulfilling the SKR requirements of multiple users over a QKD network infrastructure becomes a new challenge. This study introduces the software defined networking (SDN) technique to overcome this challenge, since SDN can add flexibility together with efficient QKD network management. A new framework of SDN for QaaS (SDQaaS) is proposed, where the QaaS functions are developed in the SDN controller. We present the protocol extension, intercommunication workflow, and routing and SKR assignment strategy for QaaS implementation in the SDQaaS framework. We also establish a SDQaaS experimental testbed and perform the numerical simulation to verify our presented approaches. Experimental results demonstrate that our presented approaches can achieve efficient and flexible QaaS over the QKD network. Moreover, simulation results indicate that the success probability of QKD service requests can be increased via lowering the flexibility of SKR requirements for QKD service creation, sacrificing more cost to produce higher SKR over the QKD network, or gradually reducing SKR requirements with the modification of QKD service.

房亮亮, 聪 梅

本文聚焦于量子密钥分发（QKD）在光纤通信系统中的安全增强机制。首先阐述了光纤通信系统面临的 安全威胁，强调保障其安全性的紧迫性。接着详细介绍了量子密钥分发的基本原理、关键技术，包括单光子源、量子 探测器等。深入分析了QKD为光纤通信系统带来的安全增强机制，如基于量子力学原理的不可窃听特性、信息论安全 性的密钥生成等。同时探讨了QKD在实际光纤通信系统应用中面临的挑战，如传输距离限制、环境干扰等，并提出了 相应的解决策略。

Nikolaos Makris, A. Papageorgopoulos, Persefoni Konteli +6 more

We experimentally evaluate the SKR generation for unoptimized QKD pairs in switched QKD and compare the performance of the switched-QKD with relayed-QKD networks to reveal they perform better for short distances and at large networks.