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.
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.
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.
The rapid adoption of cloud infrastructures has intensified concerns regarding data confidentiality, integrity, and trust management, particularly in the presence of emerging quantum computing threats. Classical cryptographic mechanisms, which underpin most existing cloud security architectures, are increasingly vulnerable to quantum attacks capable of compromising public-key encryption and key exchange protocols. To address these challenges, this paper proposes a hybrid security framework that integrates Quantum Cryptography with Blockchain technology to achieve robust, future-resistant data protection in cloud environments. The proposed framework leverages Quantum Key Distribution (QKD) to enable provably secure key generation and exchange based on quantum mechanical principles, ensuring resistance against eavesdropping and computational attacks. Blockchain technology is employed to provide decentralized trust, immutable audit trails, and transparent access control across distributed cloud services. Smart contracts enforce fine-grained security policies, automate authentication, and ensure tamper-proof data access logging. The synergy between quantum cryptography and blockchain establishes a secure key lifecycle, resilient identity management, and verifiable data integrity within multi-tenant cloud infrastructures. Comprehensive security analysis demonstrates that the proposed approach effectively mitigates quantum-enabled attacks, insider threats, and single-point-of-failure vulnerabilities commonly found in traditional cloud security models. Experimental evaluation and comparative analysis highlight improvements in data integrity assurance, key management robustness, and trust transparency, with acceptable computational and communication overhead. The results indicate that integrating quantum cryptography with blockchain presents a scalable and future-proof security paradigm for next-generation cloud infrastructures.
Quantum computing is progressing at a fast rate and there is a real threat that classical cryptographic methods can be compromised and therefore impact the security of blockchain networks. All of the ways used to secure blockchain like Rivest–Shamir–Adleman (RSA), Elliptic Curve Cryptography (ECC) and Secure Hash Algorithm 256-bit (SHA256) are the characteristic of the traditional cryptographic techniques vulnerable to attack by quantum algorithms: Shor’s and Grover’s algorithms: can efficiently break asymmetric encryption and speed up brute force attacks. Because of this vulnerability, there exists a need to develop an advance quantum resilient blockchain framework to protect the decentralized ledgers from the future threats of the quantum. This research proposes Post-Quantum Cryptography (PQC), Quantum Key Distribution (QKD) and Quantum Random Number Generation (QRNG) as a formidable architectural integration, to fortify security of blockchain. Classical encryption is replaced with PQC, QKD with secure key exchange by detecting eavesdropping, and QRNG with improving cryptographic randomness to remove the predictable key vulnerability. Only with a small loss of transaction efficiency, we increase transaction encryption accuracy, key exchange security, and resistance to quantum attacks. In this quantum enhanced blockchain design, the idea is to preserve the decentralization, transparency and security and at the same time overcome the future quantum threat. By going through rigorous analysis and comparative evaluation, we demonstrate that the approach saves blockchain networks from the emerging quantum risks to make sure that the decentralized finance, smart contracts and cross chain transactions.
The advent of quantum computing poses a threat to the bases of classical cryptographies and thus the RSA and ECC are susceptible to attacks at the time of a poly with Shors algorithm. The present paper proposes QUBE-Crypto (Quantum Unbreakable Blockchain-Enhanced Cryptography) which is a new multi-layered protocol that facilitates a synergistic combination of Quantum Key Distribution (QKD) that can provide information-theoretic key protection, Post-Quantum Digital Signatures (Dilithium-5, SQIsignHD) that offer computational authentication resilience, blockchain-based immutable identity anchoring and Pseudorandom Quantum State (PRS) challenges that can provide unforgeable verification. Unlike existing approaches that address quantum threats in isolation, QUBE-Crypto provides end-to-end quantum-safe communication by combining provably secure key exchange, quantum-resistant signatures, decentralized trust, and clone-proof authentication. The protocol is formally specified through a five-phase algorithm encompassing initialization, QKD-based session key establishment, PRS-based challengeresponse authentication, blockchain-anchored verification, and encrypted message exchange. Applications span IoT security, smart cities, digital voting, and decentralized identity systems requiring resilience against both classical and quantum adversaries.
The quality of random numbers directly determines the security of a cryptographic system. Traditional pseudo-random number generators (PRNGs) rely on a limited-length seed. Once the entropy is insufficient or the seed is attacked, although the generated sequence may appear to be close to true randomness in appearance, its actual security will significantly decline. To address this issue, this paper proposes an encryption method that combines quantum key technology with commercial encryption algorithms and applies it to an intelligent file cabinet security system. This method utilizes a quantum random number generator to create high-entropy encryption keys and integrates SM2, SM3, and SM4 block encryption algorithms to construct an efficient and reliable file encryption, transmission, and management solution. It ensures complete ciphertext protection, authentication, and data integrity throughout the file storage and retrieval process. The experimental results show that QRNG outperforms common PRNGs in terms of statistical distribution, sequence independence, and resistance to prediction attacks, achieving higher entropy source quality and lower attack surface risk. Further experiments with weak seeds and insufficient early entropy verified the unique advantages of QRNG in avoiding security degradation. Moreover, the KL difference between the encrypted ciphertext and the plaintext is approximately 1.2 times that of RSA + AES. These results indicate that this method effectively enhances the confidentiality and integrity of file exchange and has practical application and innovation potential.
Ensuring data confidentiality and integrity in critical infrastructures has become increasingly challenging due to the rise of quantum computing and the limitations of classical cryptographic systems. This paper presents Q-ChainX, a hybrid system, which combines the concepts of Quantum Key Distribution (QKD) with a Post-Quantum Cryptographic (PQC) enabled blockchain, to build ultra secure, tamper resistant and resilient in the future data infrastructures. The suggested architecture consists of two communication layers, namely quantum and classical communication to transmit data and secure keys, respectively, and uses entanglement-based E91 QKD to generate symmetric keys. The cryptographic core supports NTRU and CRYSTALS-Dilithium algorithms to substitute the standard RSA and ECC, which are resistant to quantum attacks. The consensus is obtained by the modified Proof-of-Authority mechanism supported by quantum randomness in the form of QRNGs, to allow a secure and fair election of validators. The key generation rates of a simulated Hyperledger environment simulated in Hyperledger-SimulaQron were found to be over 3800 bps, transaction finality time was found to be 408 ms on 15 nodes, and the consensus success rate was found to be 99.5. The hybrid quantum-PQC mode recorded 99.95 % data integrity and zero key compromise, ranked above the classical set up in all significant security parameters. These findings confirm the practicability of applying Q-ChainX in practice to the smart grids, defense communications, and medical data platforms. The further upgrading will be oriented on the optimization of quantum hardware, expansion of satellite-based QKD, and interoperability with multi-chain ecosystems. Q-ChainX is also a quantum leap to quantum resilient distributed systems, and it guarantees privacy, trust, and sustainability in the era of quantum computing.