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The aim of this work is to study the global existence of solutions for some coupled systems of reaction diffusion which describe the spread within a population of infectious disease. We consider a triangular matrix diffusion and we show…

Analysis of PDEs · Mathematics 2011-02-01 Abdelmalek Salem , Youkana Amar

In this paper, we systematically explore the attack surface of the Blockchain technology, with an emphasis on public Blockchains. Towards this goal, we attribute attack viability in the attack surface to 1) the Blockchain cryptographic…

Cryptography and Security · Computer Science 2019-04-09 Muhammad Saad , Jeffrey Spaulding , Laurent Njilla , Charles Kamhoua , Sachin Shetty , DaeHun Nyang , Aziz Mohaisen

As the public Ethereum network surpasses half a billion transactions and enterprise Blockchain systems becoming highly capable of meeting the demands of global deployments, production Blockchain applications are fast becoming commonplace…

Cryptography and Security · Computer Science 2019-09-24 Evan Brinckman , Andrey Kuehlkamp , Jarek Nabrzyski , Ian J. Taylor

Blockchain has attracted significant attention in recent years due to its potential to revolutionize various industries by providing trustlessness. To comprehensively examine blockchain systems, this article presents both a macro-level…

Cryptography and Security · Computer Science 2023-04-18 Minghui Xu , Yihao Guo , Chunchi Liu , Qin Hu , Dongxiao Yu , Zehui Xiong , Dusit Niyato , Xiuzhen Cheng

Exact solutions of the SEIR epidemic model are derived, and various properties of solutions are obtained directly from the exact solution. In this paper Abel differential equations play an important role in establishing the exact solution…

Populations and Evolution · Quantitative Biology 2023-02-03 Norio Yoshida

A blockchain-based framework for distributed agile software testing life cycle is an innovative approach that uses blockchain technology to optimize the software testing process. Previously, various methods were employed to address…

Software Engineering · Computer Science 2023-07-17 Muhammad Shoaib Farooq , Fatima Ahmed

Payment networks, also known as channels, are a most promising solution to the throughput problem of cryptocurrencies. In this paper we study the design of capital-efficient payment networks, offline as well as online variants. We want to…

Data Structures and Algorithms · Computer Science 2018-10-18 Georgia Avarikioti , Yuyi Wang , Roger Wattenhofer

A long-standing open problem with direct blockmodeling is that it is explicitly intended for binary, not valued, networks. The underlying dilemma is how empirical valued blocks can be compared with ideal binary blocks, an intrinsic problem…

Social and Information Networks · Computer Science 2020-01-28 Carl Nordlund

In this paper, we represent the problem of selecting miners within a blockchain-based system as a subset selection problem. We formulate the problem of minimising blockchain energy consumption as an optimisation problem with two conflicting…

Neural and Evolutionary Computing · Computer Science 2021-06-23 Akram Alofi , Mahmoud A. Bokhari , Robert Hendley , Rami Bahsoon

This study proposes a novel solution that provides secure interoperability for blockchains, which improves the overall scalability of the whole blockchain network. In our solution, a cross-chain task will build a one-time cross-blockchain…

Networking and Internet Architecture · Computer Science 2022-01-11 Keyang Liu , Yukio Ohsawa

This paper develops methods of distributed Bayesian hypothesis tests for fault detection and diagnosis that are based on belief propagation and optimization in graphical models. The main challenges in developing distributed statistical…

Systems and Control · Computer Science 2015-01-20 Kwang-Ki K. Kim

Low throughput has been the biggest obstacle of large-scale blockchain applications. During the past few years, researchers have proposed various schemes to improve the systems' throughput. However, due to the inherent inefficiency and…

Networking and Internet Architecture · Computer Science 2021-02-05 Ying-Hao Zhang , Xiao Fan Liu

This research critically analyses blockchain scaling solutions based on their ability to realistically balance the properties of the blockchain trilemma. We have concluded this research by outlining a gap in the current body of literature…

Cryptography and Security · Computer Science 2022-02-02 Frazer Chard , Cayo Fletcher-Smith

We propose a model for epidemic spreading on a finite complex network with a restriction to at most one contamination per time step. Because of a highly discrete character of the process, the analysis cannot use the continous approximation,…

Physics and Society · Physics 2013-07-23 Wojciech Ganczarek

With the escalating prevalence of malicious activities exploiting vulnerabilities in blockchain systems, there is an urgent requirement for robust attack detection mechanisms. To address this challenge, this paper presents a novel…

The world economy is experiencing the novel adoption of distributed currencies that are free from the control of central banks. Distributed currencies suffer from extreme volatility, and this can lead to catastrophic implications during…

Cryptography and Security · Computer Science 2022-06-22 Jacques Bou Abdo , Shuvalaxmi Dass , Basheer Qolomany , Liaquat Hossain

This paper deals with design of the alternative secure Blockchain network framework to prevent damages from an attacker. The concept of the strategic alliance of the management is applied on the top of the recent developed stochastic game…

Cryptography and Security · Computer Science 2022-02-15 Song-Kyoo Kim

This paper describes the design and development of a decentralized firewall system powered by a novel malware detection engine. The firewall is built using blockchain technology. The detection engine aims to classify Portable Executable…

Cryptography and Security · Computer Science 2017-11-07 Saurabh Raje , Shyamal Vaderia , Neil Wilson , Rudrakh Panigrahi

This study provides a practical introduction to high-frequency trading in blockchain-based currency markets. These types of markets have some specific characteristics that differentiate them from the stock markets, such as a large number of…

General Economics · Economics 2023-04-19 Vittorio Astarita

This paper deals with the design of the secure blockchain network framework to prevent damages from an attacker. The decentralized network design called the Blockchain Governance Game is a new hybrid theoretical model and it provides the…

Cryptography and Security · Computer Science 2019-09-05 Song-Kyoo Kim