Towards Quantum-Secured Permissioned Blockchain: Signature, Consensus, and Logic

While Blockchain technology is universally considered as a significant technology for the near future, some of its pillars are under a threat of another thriving technology, Quantum Computing. In this paper, we propose important safeguard measures against this threat by developing a framework of a q...

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Bibliographic Details
Published in:Entropy (Basel, Switzerland) Vol. 21; no. 9; p. 887
Main Authors: Sun, Xin, Sopek, Mirek, Wang, Quanlong, Kulicki, Piotr
Format: Journal Article
Language:English
Published: Basel MDPI AG 01.09.2019
MDPI
Subjects:
Algorithms
Blockchain
Boolean
Communication
consensus
digital signature
Digital signatures
lottery
Quantum computers
Quantum computing
Quantum cryptography
ISSN:1099-4300, 1099-4300
Online Access:Get full text
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Summary:While Blockchain technology is universally considered as a significant technology for the near future, some of its pillars are under a threat of another thriving technology, Quantum Computing. In this paper, we propose important safeguard measures against this threat by developing a framework of a quantum-secured, permissioned blockchain called Logicontract (LC). LC adopts a digital signature scheme based on Quantum Key Distribution (QKD) mechanisms and a vote-based consensus algorithm to achieve consensus on the blockchain. The main contribution of this paper is in the development of: (1) unconditionally secure signature scheme for LC which makes it immune to the attack of quantum computers; (2) scalable consensus protocol used by LC; (3) logic-based scripting language for the creation of smart contracts on LC; (4) quantum-resistant lottery protocol which illustrates the power and usage of LC.
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ISSN:1099-4300
1099-4300
DOI:10.3390/e21090887