This paper proposes, implements and tests a resilient and decentralized system based on blockchain and quantum-secure communication for cyber, scientific, and strategic diplomacy. By introducing a dynamic post-quantum cryptographic binding layer, the proposed architecture significantly amplifies organizational resilience against sovereign-state data disruption and harvesting attempts within highly adversarial environments. The system guarantees end-to-end transparency and confidentiality in the sharing of resources, and it can be used in resilient organizations and for cyber, scientific, and strategic diplomacy. It integrates the following technologies and modules: blockchain technology with a semantic distribution of quantum keys, a frontend interface built exclusively with React, a backend module implemented in Python Flask 3.1.2 and served via Gunicorn 25.0.3, and a set of modular components dedicated to blockchain, quantum simulation, and distributed storage. Moving past theoretical bounds, this work presents structural Threat Models, real-world deployment parameters for Eastern European research infrastructures, and multi-variable empirical performance evaluations under authentic institutional workloads. Moreover, the proposed architecture offers an extensible foundation for the development of future resilient ecosystems supported by blockchain and quantum technologies.
This paper proposes, implements and tests a resilient and decentralized system based on blockchain and quantum-secure communication for cyber, scientific, and strategic diplomacy. By introducing a dynamic post-quantum cryptographic binding layer, the proposed architecture significantly amplifies organizational resilience against sovereign-state data disruption and harvesting attempts within highly adversarial environments. The system guarantees end-to-end transparency and confidentiality in the sharing of resources, and it can be used in resilient organizations and for cyber, scientific, and strategic diplomacy. It integrates the following technologies and modules: blockchain technology with a semantic distribution of quantum keys, a frontend interface built exclusively with React, a backend module implemented in Python Flask 3.1.2 and served via Gunicorn 25.0.3, and a set of modular components dedicated to blockchain, quantum simulation, and distributed storage. Moving past theoretical bounds, this work presents structural Threat Models, real-world deployment parameters for Eastern European research infrastructures, and multi-variable empirical performance evaluations under authentic institutional workloads. Moreover, the proposed architecture offers an extensible foundation for the development of future resilient ecosystems supported by blockchain and quantum technologies.
The paper presents the results of the authors' research for 14 months within a project funded by the Romanian Academy of Scientists. The design, implementation and testing of a decentralized web3 platform, based on Blockchain technologies – including smart contracts and Quantum, useful for education and diplomacy, is presented. The platform can also be used for knowledge management - for explicit knowledge flows. Our architecture allows quantum-enhanced authentication – offering an experimental, but future-oriented alternative to completely classical systems. It consists of a modular, layered structure, which includes the components: frontend, backend, quantum service integration, decentralized storage (IPFS) and blockchain registry. The platform is implemented and tested using several work scenarios. The paper demonstrates the efficacy of a decentralized academic infrastructure capable of harmonizing hybrid security paradigms with distributed storage technologies. Theoretically and technically, the major contribution of this work lies in the transition from a theoretical model to a fully operational system validated through an end-to-end workflow.
Blockchain ecosystems and platforms form a critical foundation for national digital economies worldwide. However, recent advancements in quantum computing, exemplified by breakthroughs from IBM and other leading developers, reveal that these systems may no longer guarantee stability and security against emerging quantum-enabled attacks. The increasing feasibility of such threats, commonly referred to as the “quantum threat,” poses unprecedented risks to the integrity, confidentiality, and reliability of blockchain infrastructures. In response, several technologically advanced countries have initiated efforts to anticipate and mitigate potential quantum cyberattacks. Ensuring the quantum resilience of blockchain systems necessitates novel approaches beyond conventional information security methods. Unlike traditional protections, these approaches aim to prevent systemic failures even under quantum-enabled adversarial conditions. The study identifies and systematizes the main directions for achieving quantum resilience, including post-quantum cryptographic primitives, modified quantum algorithms, and hybrid quantum–classical security models. The review highlights how progress in superconducting, ionic, photonic, and neutral-atom quantum platforms reshapes the threat landscape. A distinctive contribution of this work lies in its integrative perspective — linking cryptographic, architectural, and ecosystem-level aspects of blockchain sustainability under quantum threats. The proposed framework emphasizes combining post-quantum cryptography, quantum-safe protocols, and cross-domain coordination between quantum computing and cybersecurity research. Given the rapidly advancing nature of quantum technologies, the findings presented here not only reflect the current state of the field but also outline strategic directions for developing adaptive, quantum-resilient blockchain systems, including dynamic algorithmic frameworks, formal verification of quantum-resistant smart contracts, and simulation of blockchain protocols against quantum adversary models.
This paper introduces a fully decentralized communication platform that enables secure messaging and file sharing by integrating a quantum random number generator (QRANG) to enhance cryptographic strength against future quantum threats. The proposed system leverages blockchain technology for tamper-resistant recordkeeping, distributed storage through IPFS, and end-to-end encryption using quantum-derived entropy. Unlike conventional decentralized applications that rely on classical pseudo-random number generators, our approach utilizes true quantum randomness to generate encryption keys, significantly increasing unpredictability and resistance to cryptanalytic attacks. The architecture is organized into presentation, orchestration, and data storage layers to ensure clear separation of functions and facilitate robust security. Empirical evaluation demonstrates substantial improvements in randomness quality, key security, and overall system resilience when compared to traditional methods, highlighting the effectiveness of quantum-enhanced cryptography in practical decentralized applications.
Quantum computing poses a significant threat to blockchain systems that rely on elliptic curve cryptography and other classical security mechanisms. Algorithms such as Shor’s and Grover’s can weaken or completely break the cryptographic foundations of current blockchain networks, exposing them to risks including private key recovery, transaction forgery, consensus manipulation, and harvest-now-decrypt-later attacks. This paper presents a systems framework for designing quantum-resilient blockchains by integrating post-quantum cryptographic standards, threat modeling, architectural redesign, governance mechanisms, and migration planning. The study evaluates major post-quantum cryptographic primitives, assesses their suitability for blockchain environments, and proposes a layered architecture grounded in crypto-agility, defense-in-depth, and forward secrecy. A structured migration strategy is also introduced to support the transition of existing blockchain networks toward post-quantum security while maintaining operational continuity and stakeholder trust. The framework provides practical guidance for researchers, developers, and policymakers preparing blockchain ecosystems for the post-quantum era.
The integration of quantum cryptography and blockchain offers a transformative approach to enhance data security in cloud environments. Quantum cryptography, leveraging principles of quantum mechanics such as quantum key distribution (QKD), ensures unbreakable encryption by enabling secure key exchange. Simultaneously, blockchain technology introduces decentralization, transparency, and immutability, ensuring data integrity and preventing unauthorized tampering. This research explores the synergy between these technologies to develop a novel framework for cloud security. The proposed model leverages QKD for secure communication channels and blockchain-based distributed ledgers for verifying transactions and access control. Key contributions include a hybrid encryption mechanism using quantum keys, a consensus algorithm optimized for cloud operations, and integration strategies to mitigate quantum attacks. Performance evaluations demonstrate enhanced resilience against data breaches, improved key management, and seamless scalability for modern cloud architectures. This study establishes a secure, future-proof infrastructure that addresses emerging threats in the post-quantum era while ensuring trust, confidentiality, and data integrity in cloud ecosystems.
Abstract The rapid advancement of quantum technologies is reshaping the landscape of cybersecurity, communications, and critical infrastructure protection, including maritime logistics infrastructures, smart ports, vessel traffic management systems, and autonomous maritime platforms, while simultaneously generating both substantial opportunities and emerging security challenges. Emerging paradigms such as Quantum Key Distribution (QKD), quantum networks, and post-quantum cryptography challenge the adequacy of classical security mechanisms. This study aims to examine the dual-use nature of quantum technologies and evaluate their implications for secure communication and navigation systems in maritime logistics, smart port ecosystems, and defence-oriented environments. The research adopts a conceptual and analytical approach, examining current developments in quantum technologies along with their cybersecurity implications. It evaluates the limitations of existing cryptographic systems in the context of quantum computing advancements and explores hybrid security models that integrate post-quantum cryptography with quantum communication techniques. The analysis also considers defence-oriented requirements, including resilience, secure communications, and the protection of critical infrastructure within NATO-aligned environments. The findings highlight that classical cryptographic approaches are increasingly vulnerable to quantum-enabled attacks, necessitating a transition towards quantum-resilient architectures. The study identifies the strategic advantages of quantum technologies, such as enhanced security through QKD, while also highlighting associated risks, including implementation complexity, operational constraints, and policy challenges. The dual-use character of these technologies is shown to have significant implications in both the civilian and military sectors. Finally, the paper proposes a unified conceptual framework that bridges current cybersecurity practices with emerging quantum-enabled paradigms. The framework supports the development of adaptive, sustainable, and future-proof security architectures capable of addressing evolving threat landscapes. The results underscore the importance of coordinated technological, operational, and policy efforts to ensure secure adoption of quantum technologies in critical domains. Special attention is paid to the resilience of maritime communications and navigation infrastructures against quantum-enabled cyber threats, including GNSS spoofing, communication intercept, and supply-chain disruption.