Quantum key distribution (QKD) is a promising technique for addressing quantum threats. To enable easy-to-use cryptographic services based on QKD, we designed a cryptosystem that integrates classical cryptographic systems with key generation and distribution using a QKD network. The proposed cryptosystem comprises a centrally deployed cryptography management service platform and distributed key management systems. The paper presents the functional modules, main processes, interface design, and security requirements of the cryptosystem. This cryptosystem provides a secure and efficient way to offer cryptographic services for various business applications, such as identity authentication, application authorization and point-to-point or group session key distribution. By integrating QKD with classical cryptosystems, this approach can improve the security of traditional cryptographic systems by using the random and unconditionally secure keys generated by QKD. Furthermore, combining QKD with classical cryptographic systems can enhance the scalability of QKD and provide more efficient and cost-effective solutions for large-scale cryptographic services.
Quantum key distribution (QKD) is a promising technique for addressing quantum threats. To enable easy-to-use cryptographic services based on QKD, we designed a cryptosystem that integrates classical cryptographic systems with key generation and distribution using a QKD network. The proposed cryptosystem comprises a centrally deployed cryptography management service platform and distributed key management systems. The paper presents the functional modules, main processes, interface design, and security requirements of the cryptosystem. This cryptosystem provides a secure and efficient way to offer cryptographic services for various business applications, such as identity authentication, application authorization and point-to-point or group session key distribution. By integrating QKD with classical cryptosystems, this approach can improve the security of traditional cryptographic systems by using the random and unconditionally secure keys generated by QKD. Furthermore, combining QKD with classical cryptographic systems can enhance the scalability of QKD and provide more efficient and cost-effective solutions for large-scale cryptographic services.
Secure cryptographic key distribution is one of the essential conditions of modern protection of digital communications. The rise of large-scale quantum computing is a very real threat to traditional public-key cryptosystems, with the most commonly used cryptosystems, including RSA and elliptic curve cryptography, being easily broken with the help of quantum algorithms. Despite the demonstrable security offered by Quantum Key Distribution (QKD) through the laws of quantum mechanics, it has a limited range of transmission, expensive hardware, and it is difficult to scale. In order to overcome these shortcomings, this paper will propose a Hybrid Quantum-Classical Key Distribution (HQCKD) framework that combines quantum key generation and classical key management schemes. The proposed solution uses QKD to create a short and very safe quantum key seed, which then scalable classical cryptographic protocols based on long distance and large scale communication are booted up. The frames are tested by means of simulation in real network conditions, the latency, throughput, and security resilience are assessed. It is experimentally proven that the suggested hybrid model attains low end-to-end latency and high scalability with high resistance to both classical and quantum adversaries. The HQCKD framework is much simpler to implement and significantly less expensive in terms of infrastructure and deployment compared to bare QKD systems, which means that it is a realistic and future-proof approach to post-quantum safe communication.
This paper presents an innovative architecture for blockchain systems that integrates quantum key distribution (QKD) cryptography as a fundamental component to enhance the security and integrity of transactions in the face of the growing threat posed by quantum computers. The proposed architecture leverages the unconditional security of QKD, based on the laws of quantum physics, to protect the blockchain against potential attacks that could compromise classical cryptographic algorithms. We explore the architecture design, consensus protocols, transaction authentication mechanisms, and the practical implications of integrating QKD into blockchain systems. The analysis focuses on the quantum key distribution systems from ID Quantique (IDQ), recognised for their robustness and reliability, to highlight the feasibility and benefits of implementing QKD in real-world scenarios. Additionally, we explore the challenges and opportunities inherent in implementing this architecture, including QKD scalability, key management, interoperability, and integration with existing communication infrastructures.
This paper presents an innovative architecture for blockchain systems that integrates quantum key distribution (QKD) cryptography as a fundamental component to enhance the security and integrity of transactions in the face of the growing threat posed by quantum computers. The proposed architecture leverages the unconditional security of QKD, based on the laws of quantum physics, to protect the blockchain against potential attacks that could compromise classical cryptographic algorithms. We explore the architecture design, consensus protocols, transaction authentication mechanisms, and the practical implications of integrating QKD into blockchain systems. The analysis focuses on the quantum key distribution systems from ID Quantique (IDQ), recognised for their robustness and reliability, to highlight the feasibility and benefits of implementing QKD in real-world scenarios. Additionally, we explore the challenges and opportunities inherent in implementing this architecture, including QKD scalability, key management, interoperability, and integration with existing communication infrastructures.
The security of quantum cryptography relies on the foundations of quantum mechanics, in contrast to traditional public key cryptography which relies on the computational difficulty of certain mathematical functions, and cannot provide any indication of eavesdropping or guarantee of key security. The proposal present in this work develops a quantum key distribution model to safeguard security in large networks, in the directions of classical cryptography and quantum cryptography. Two three-party Quantum key distribution are used in this model, one with implicit user authentication and the other with explicit mutual authentication, are proposed to demonstrate the merits of the new combination. The performance of Quantum Key Distribution (QKD) systems have notably progressed since the early experimental demonstrations. The current evolutions in QKD research indicate that the pace of this progression is very likely to be maintained, if not increased, in the future years. In parallel to these improvements of QKD techniques, commercial products are also being developed, making QKD deployment a feasible alternative for securing real data networks. Deployment of a real QKD network is however far from being straightforward. It requires development of a network architecture connecting multiple users that may possibly be very far away from each other. Considering the fact that the existing QKD links are only point-to-point, and intrinsically limited in distance, deployment of a practical QKD network structure is a nontrivial problem. The proposed work describes the proposed architecture for a QKD network specify the requirements relevant to the network design, protocols, and services. The objective of this specification is to define the major components and their main features The proposal provides security against such attacks as man-in-the-middle, eavesdropping and replay. It also improves the efficiency of the quantum key distribution which contains the fewest number of communication rounds among existing Quantum key distributions. In this model two parties can share and use a long-term secret (repeatedly). To prove the security of the proposed schemes, this proposed model provides a primitive called the Unbiased-Chosen Basis (UCB) assumption with the quantum key in angular positions.
The widespread cryptographic methods RSA and AES have become more susceptible to quantum-based attacks because researchers developed quantum algorithms such as Shor's and Grover's. QKD chromosomes from quantum mechanics grant authorized parties the ability to exchange cryptographic keys securely alongside built-in eavesdropping detection functionality. In the proposed method a Quantum Key Distribution (QKD) is used to integrate into cloud environments to secure data against quantum threats which have become crucial security concerns today. A new security framework for combining QKD with standard cloud utilities strengthens both access privacy and verify data integrity and ensure authentication of user information. The system framework consists of key generation from quantum elements followed by distribution through quantum channels to support secure communication protocols for Software as a Service (SaaS) and Platform as a Service (PaaS) as well as Infrastructure as a Service (IaaS). The key performance evaluation of the QKD system includes measurements of key generation rate together with Quantum Bit Error Rate (QBER) and eavesdropping detection accuracy rates. The analysis against traditional cryptographic systems proves that QKD stands superior in quantum attack resilience. The proposed system demonstrates its efficiency and robustness through simulation outcomes as well as visual representations. The presented work demonstrates both the revolutionary capability of quantum technology for cloud security along with a deployable system architecture for future systems implementation. The research work advances the creation of cloud infrastructure systems which combine high security resilience to protect against future cyber threats.
The paper explores approaches to ensuring information security using quantum key distribution (QKD) in combination with classical cryptographic schemes: the Blom scheme, Key Distribution Pattern (KDP), and the Lagrange scheme. It demonstrates how quantum technologies enhance the security and efficiency of these methods. The proposed schemes provide resilience against attacks by both classical and quantum computers, addressing vulnerabilities in traditional key generation methods. Examples of applications in secure IoT networks, cloud computing, and distributed systems are discussed. The results show that the combination of QKD with cryptographic schemes is a promising solution for the post-quantum era.