Next Article in Journal
Channel Capacity of Concurrent Probabilistic Programs
Next Article in Special Issue
A Comprehensive Study of the Key Enumeration Problem
Previous Article in Journal
On the Security of a Latin-Bit Cube-Based Image Chaotic Encryption Algorithm
Previous Article in Special Issue
Coin.AI: A Proof-of-Useful-Work Scheme for Blockchain-Based Distributed Deep Learning
Open AccessArticle

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

Institute of Logic and Cognition, Sun Yat-sen University, Guangzhou 510275, China
MakoLab SA, 91062 Łódź, Poland
Department of Computer Science, University of Oxford, Oxford OX13QD, UK
Department of the Foundations of Computer Science, Catholic University of Lublin, 20950 Lublin, Poland
Author to whom correspondence should be addressed.
Entropy 2019, 21(9), 887;
Received: 7 July 2019 / Revised: 5 September 2019 / Accepted: 5 September 2019 / Published: 12 September 2019
(This article belongs to the Special Issue Blockchain: Security, Challenges, and Opportunities)
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. View Full-Text
Keywords: blockchain; quantum computing; consensus; digital signature; lottery blockchain; quantum computing; consensus; digital signature; lottery
Show Figures

Figure 1

MDPI and ACS Style

Sun, X.; Sopek, M.; Wang, Q.; Kulicki, P. Towards Quantum-Secured Permissioned Blockchain: Signature, Consensus, and Logic. Entropy 2019, 21, 887.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop