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

      research-article
      1 , 2 , 3 , 4 , *
      Entropy
      MDPI
      blockchain, quantum computing, consensus, digital signature, lottery

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          Abstract

          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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          Most cited references63

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          The Byzantine Generals Problem

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            Polynomial-Time Algorithms for Prime Factorization and Discrete Logarithms on a Quantum Computer

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              New hash functions and their use in authentication and set equality

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                Author and article information

                Journal
                Entropy (Basel)
                Entropy (Basel)
                entropy
                Entropy
                MDPI
                1099-4300
                12 September 2019
                September 2019
                : 21
                : 9
                : 887
                Affiliations
                [1 ]Institute of Logic and Cognition, Sun Yat-sen University, Guangzhou 510275, China; xin.sun.logic@ 123456gmail.com
                [2 ]MakoLab SA, 91062 Łódź, Poland; sopek@ 123456makolab.com
                [3 ]Department of Computer Science, University of Oxford, Oxford OX13QD, UK; quaang@ 123456cs.ox.ac.uk
                [4 ]Department of the Foundations of Computer Science, Catholic University of Lublin, 20950 Lublin, Poland
                Author notes
                [* ]Correspondence: kulicki@ 123456kul.pl
                Author information
                https://orcid.org/0000-0001-9320-2522
                Article
                entropy-21-00887
                10.3390/e21090887
                7515423
                0858e3da-dda9-485a-abf0-a57dcf83fe22
                © 2019 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 07 July 2019
                : 05 September 2019
                Categories
                Article

                blockchain,quantum computing,consensus,digital signature,lottery

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