QDBFT: A Dynamic Consensus Algorithm for Quantum-Secured Blockchain

• URL: http://arxiv.org/abs/2602.11606v1
• Date: Thu, 12 Feb 2026 05:53:51 GMT
• Title: QDBFT: A Dynamic Consensus Algorithm for Quantum-Secured Blockchain
• Authors: Fei Xu, Cheng Ye, Jie OuYang, Ziqiang Wu, Haoze Chen, An Hua, Meifeng Gao, Qiandong Zhang, Minghan Li, Feilong Li, Yajun Miao, Wei Qi,
• Abstract summary: Quantum computing poses a significant threat to conventional public-key cryptosystems.<n>We propose QFT, a quantum-secured dynamic consensus algorithm.
• Score: 11.38225673790071
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The security foundation of blockchain system relies primarily on classical cryptographic methods and consensus algorithms. However, the advent of quantum computing poses a significant threat to conventional public-key cryptosystems based on computational hardness assumptions. In particular, Shor's algorithm can efficiently solve discrete logarithm and integer factorization problems in polynomial time, thereby undermining the immutability and security guarantees of existing systems. Moreover, current Practical Byzantine Fault Tolerance (PBFT) protocols, widely adopted in consortium blockchains, suffer from high communication overhead and limited efficiency when coping with dynamic node reconfigurations, while offering no intrinsic protection against quantum adversaries. To address these challenges, we propose QDBFT, a quantum-secured dynamic consensus algorithm, with two main contributions: first,we design a primary node automatic rotation mechanism based on a consistent hash ring to enable consensus under dynamic membership changes, ensuring equitable authority distribution; second, we integrate Quantum Key Distribution (QKD) networks to provide message authentication for inter-node communication, thereby achieving information-theoretic security in the consensus process. Experimental evaluations demonstrate that QDBFT achieves performance comparable to traditional PBFT while delivering strong resilience against quantum attacks, making it a promising solution for future quantum-secure decentralized infrastructures.

Related papers

• Verifier-initiated quantum message-authentication via quantum zero-knowledge proofs [38.81686642226027]
  We introduce a new method where the verifier can request authentication only when needed, improving efficiency for quantum networks and blockchain applications.<n>Our approach adapts the concept of zero-knowledge widely used in classical cryptography to quantum settings, ensuring that verification reveals nothing about secret keys.<n>This work delivers the first general verifier-initiated quantum signature scheme with formal security, paving the way for scalable, secure authentication in future quantum infrastructures and decentralized systems.
  arXiv  Detail & Related papers  (2025-12-05T04:40:34Z)
• Security and Privacy Management of IoT Using Quantum Computing [0.0]
  The convergence of the Internet of Things (IoT) and quantum computing is redefining the security paradigm of interconnected digital systems.<n>Classical cryptographic algorithms such as RSA, Elliptic Curve Cryptography (ECC), and Advanced Encryption Standard (AES) have long provided the foundation for securing IoT communication.<n>The emergence of quantum algorithms such as Shor's and Grover's threatens to render these techniques vulnerable, necessitating the development of quantum-resilient alternatives.
  arXiv  Detail & Related papers  (2025-11-05T15:08:55Z)
• Federated Quantum Kernel Learning for Anomaly Detection in Multivariate IoT Time-Series [27.38765909731335]
  We propose a Federated Quantum Kernel Learning (FQKL) framework that integrates quantum feature maps with federated aggregation.<n>FQKL achieves superior generalization in capturing complex temporal correlations compared to classical federated baselines.<n>This work highlights the promise of quantum kernels in federated settings, advancing the path toward scalable, robust, and quantum-enhanced intelligence for next-generation IoT infrastructures.
  arXiv  Detail & Related papers  (2025-11-04T06:35:53Z)
• A Quantum Walk-Enabled Blockchain with Weighted Quantum Voting Consensus [7.048887159038287]
  This work proposes a novel quantum blockchain framework based on quantum walks.<n>We propose a quantum consensus mechanism based on a weighted quantum voting protocol.<n>Compared with existing entanglement-dependent approaches, our framework achieves stronger stability and enables simpler verification of block integrity.
  arXiv  Detail & Related papers  (2025-10-09T07:26:14Z)
• Quantum Skyshield: Quantum Key Distribution and Post-Quantum Authentication for Low-Altitude Wireless Networks in Adverse Skies [36.14072181405793]
  Low-altitude wireless networks (LAWNs) have emerged as a critical backbone for supporting the low-altitude economy.<n>To meet growing data demands, some LAWN deployments incorporate free-space optical (FSO) links, which offer exceptional bandwidth and beam directivity.<n>Quantum Skyshield is proposed to enable reliable communication between the base transceiver station (BTS) and LAWN.
  arXiv  Detail & Related papers  (2025-07-20T04:43:33Z)
• Hybrid Quantum Security for IPsec [1.8637078358591843]
  This paper presents the first systematic comparison of sequential versus parallel hybrid QKD-PQC key establishment strategies for IPsec.<n>We introduce two novel approaches for incorporating QKD into Internet Key Exchange version 2 (IKEv2) with support for both ETSI GS QKD 004 stateful and ETSI GS QKD 014 stateless API specifications.<n>Our key insight is that parallel hybrid approaches eliminate the multiplicative latency penalties inherent in sequential methods mandated by RFC 9370.
  arXiv  Detail & Related papers  (2025-07-12T13:54:04Z)
• Integration of quantum random number generators with post-quantum cryptography algorithms [33.72751145910978]
  Post-Quantum Cryptography (PQC) has become a potential solution to prolong the life of existing Public Key Infrastructure (PKI) systems.<n>PQC protocols depend on high-quality randomness for key generation and encapsulation procedures.<n>We demonstrate a proof-of-concept enabling the incorporation of Quantum Random Number Generation (QRNG) devices within communication networks using PQC-based Transport Layer Security (TLS)
  arXiv  Detail & Related papers  (2025-07-01T10:56:39Z)
• Post-Quantum Cryptography: An Analysis of Code-Based and Lattice-Based Cryptosystems [55.49917140500002]
  Quantum computers will be able to break modern cryptographic systems using Shor's Algorithm.<n>We first examine the McEliece cryptosystem, a code-based scheme believed to be secure against quantum attacks.<n>We then explore NTRU, a lattice-based system grounded in the difficulty of solving the Shortest Vector Problem.
  arXiv  Detail & Related papers  (2025-05-06T03:42:38Z)
• Quantum Key Distribution with Efficient Post-Quantum Cryptography-Secured Trusted Node on a Quantum Network [1.445798244256451]
  Quantum Key Distribution (QKD) enables two distant users to exchange a secret key with information-theoretic security.<n>We present an efficient scheme leveraging a trusted node with lower privacy requirements thanks to the use of post-quantum cryptographic techniques.
  arXiv  Detail & Related papers  (2025-04-02T08:06:16Z)
• Quantum-Safe integration of TLS in SDN networks [0.0]
  transition to quantum-safe cryptography within the next decade is critical.<n>We have selected Transport Layer Security as the foundation to hybridize classical, quantum, and post-quantum cryptography.<n>The performance of this approach has been demonstrated using a deployed production infrastructure.
  arXiv  Detail & Related papers  (2025-02-24T14:35:56Z)
• Implementing an information-theoretically secure Byzantine agreement with quantum signed message solution [9.643164830645038]
  Byzantine agreement (BA) enables all honest nodes in a decentralized network to reach consensus.<n>We propose a quantum signed Byzantine agreement (QSBA) protocol based on the quantum signed message (QSM) scheme.<n>Our protocol achieves information-theoretic security using only QKD-shared key resources between network nodes.
  arXiv  Detail & Related papers  (2025-02-08T10:30:37Z)
• Practical hybrid PQC-QKD protocols with enhanced security and performance [44.8840598334124]
  We develop hybrid protocols by which QKD and PQC inter-operate within a joint quantum-classical network. In particular, we consider different hybrid designs that may offer enhanced speed and/or security over the individual performance of either approach.
  arXiv  Detail & Related papers  (2024-11-02T00:02:01Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.