AN ESSENTIAL GUIDE TO USING BLOCKCHAIN TO PROVIDE FLEXIBILITY, COST-SAVINGS, AND SECURITY TO DATA MANAGEMENT, DATA ANALYSIS, AND INFORMATION SHARING Blockchain for Distributed Systems Security contains a description of the properties that underpin the formal foundations of Blockchain technologies and explores the practical issues for deployment in cloud and Internet of Things (IoT) platforms. The authors—noted experts in the field—present security and privacy issues that must be addressed for Blockchain technologies to be adopted for civilian and military domains. The book covers a range of topics including data provenance in cloud storage, secure IoT models, auditing architecture, and empirical validation of permissioned Blockchain platforms. The book's security and privacy analysis helps with an understanding of the basics of Blockchain and it explores the quantifying impact of the new attack surfaces introduced by Blockchain technologies and platforms. In addition, the book contains relevant and current updates on the topic. This important resource: Provides an overview of Blockchain-based secure data management and storage for cloud and IoT Covers cutting-edge research findings on topics including invariant-based supply chain protection, information sharing framework, and trust worthy information federation Addresses security and privacy concerns in Blockchain in key areas, such as preventing digital currency miners from launching attacks against mining pools, empirical analysis of the attack surface of Blockchain, and more Written for researchers and experts in computer science and engineering, Blockchain for Distributed Systems Security contains the most recent information and academic research to provide an understanding of the application of Blockchain technology.
The main objective of this book is to explore the concept of cybersecurity in parallel and distributed computing along with recent research developments in the field. It also includes various real-time/offline applications and case studies in the fields of engineering and computer science and the modern tools and technologies used. Information on cybersecurity technologies is organized in the fifteen chapters of this book. This important book cover subjects such as: Research and solutions for the problem of hidden image detection Security aspects of data mining and possible solution techniques A comparative analysis of various methods used in e-commerce security and how to perform secure payment transactions in an efficient manner Blockchain technology and how it is crucial to the security industry Security for the Internet of Things Security issues and challenges in distributed computing security such as heterogeneous computing, cloud computing, fog computing, etc. Demonstrates the administration task issue in unified cloud situations as a multi-target enhancement issue in light of security Explores the concepts of cybercrime and cybersecurity and presents the statistical impact it is having on organizations Highlights some strategies for maintaining the privacy, integrity, confidentiality and availability of cyber information and its real-world impacts such as mobile security software for secure email and online banking, cyber health check programs for business, cyber incident response management, cybersecurity risk management Security policies and mechanisms, various categories of attacks (e.g., denial-of-service), global security architecture, along with distribution of security mechanisms Security issues in the healthcare sector with existing solutions and emerging threats.
This book constitutes the refereed proceedings of the 35th IFIP TC 11 International Conference on Information Security and Privacy Protection, SEC 2020, held in Maribor, Slovenia, in September 2020. The conference was held virtually due to the COVID-19 pandemic. The 29 full papers presented were carefully reviewed and selected from 149 submissions. The papers present novel research on theoretical and practical aspects of security and privacy protection in ICT systems. They are organized in topical sections on channel attacks; connection security; human aspects of security and privacy; detecting malware and software weaknesses; system security; network security and privacy; access control and authentication; crypto currencies; privacy and security management; and machine learning and security.
This comprehensive guide to blockchain technologies in networks covers principles, core technologies and innovative applications. It gives unprecedented insights into recent advances and developments in the area, and explains how blockchain technologies make networks more secure and fit-for-purpose. A wide range of topics are covered, touching on many of the areas where this technology is already in use. Applications include cryptographic hash, digital signature and distributed consensus mechanisms, smart contracts, social networks, reputation systems, and security and financial services.
This book constitutes the thoroughly refereed post conference papers of the First International Conference on Blockchain and Trustworthy Systems, Blocksys 2019, held in Guangzhou, China, in December 2019. The 50 regular papers and the 19 short papers were carefully reviewed and selected from 130 submissions. The papers are focus on Blockchain and trustworthy systems can be applied to many fields, such as financial services, social management and supply chain management.
Since its first use in 2008, blockchain technology has come a long way. It has developed to distributed virtual machines that execute smart contracts and much more. Blockchains have a potential application in many industries and offer great innovation potential for organizations. With all the opportunities and value new technologies can deliver, the risks are often neglected. This is why in this book, Florian Mair identifies risks to data integrity on blockchains. Further he assesses the differences regarding data integrity among private and public blockchains. Mair has found overall 11 risks which are applicable to public blockchains. But even though some of them got rated as a high risk there is currently no evidence that a blockchain should be considered insecure. The author discusses some actions that can be taken to mitigate the identified risks. In this book: - data security; - risk management; - bitcoin; - risk assessment; - Distributed Ledger Technology
Blockchain and other trustless systems have gone from being relatively obscure technologies, which were only known to a small community of computer scientists and cryptologists, to mainstream phenomena that are now considered powerful game changers for many industries. This book explores and assesses real-world use cases and case studies on blockchain and related technologies. The studies describe the respective applications and address how these technologies have been deployed, the rationale behind their application, and finally, their outcomes. The book shares a wealth of experiences and lessons learned regarding financial markets, energy, SCM, healthcare, law and compliance. Given its scope, it is chiefly intended for academics and practitioners who want to learn more about blockchain applications.
Get ahead of the curve—learn about big data on the blockchain Blockchain came to prominence as the disruptive technology that made cryptocurrencies work. Now, data pros are using blockchain technology for faster real-time analysis, better data security, and more accurate predictions. Blockchain Data Analytics For Dummies is your quick-start guide to harnessing the potential of blockchain. Inside this book, technologists, executives, and data managers will find information and inspiration to adopt blockchain as a big data tool. Blockchain expert Michael G. Solomon shares his insight on what the blockchain is and how this new tech is poised to disrupt data. Set your organization on the cutting edge of analytics, before your competitors get there! Learn how blockchain technologies work and how they can integrate with big data Discover the power and potential of blockchain analytics Establish data models and quickly mine for insights and results Create data visualizations from blockchain analysis Discover how blockchains are disrupting the data world with this exciting title in the trusted For Dummies line!
This book constitutes the refereed proceedings of the 21st International Symposium on Stabilization, Safety, and Security of Distributed Systems, SSS 2019, held in Pisa, Italy, in October 2019. The 21 full papers presented were carefully reviewed and selected from 45 submissions. The papers deal with the design and development of distributed systems with a focus on systems that are able to provide guarantees on their structure, performance, and/or security in the face of an adverse operational environment.
This book constitutes the proceedings of the 16th International Conference on Distributed Computing and Internet Technology, ICDCIT 2020, held in Bhubaneswar, India, in January 2020. The 20 full and 3 short papers presented in this volume were carefully reviewed and selected from 110 submissions. In addition, the book included 6 invited papers. The contributions were organized in topical sections named: invited talks; concurrent and distributed systems modelling and verification; cloud and grid computing; social networks, machine learning and mobile networks; data processing and blockchain technology; and short papers.
Build secure private blockchain networks to handle mission-critical security challenges such as denial-of-service attacks, user wallets, and pool mining attacks Key Features Explore blockchain concepts such as cryptography, consensus algorithms, and security assumptions Architect network security for mission-critical decentralized apps (Dapps) using design security considerations Consider various deployment and operational aspects while building a blockchain network Book Description Blockchain adoption has extended from niche research to everyday usage. However, despite the blockchain revolution, one of the key challenges faced in blockchain development is maintaining security, and this book will demonstrate the techniques for doing this. You’ll start with blockchain basics and explore various blockchain attacks on user wallets, and denial of service and pool mining attacks. Next, you’ll learn cryptography concepts, consensus algorithms in blockchain security, and design principles while understanding and deploying security implementation guidelines. You’ll not only cover architectural considerations, but also work on system and network security and operational configurations for your Ethereum and Hyperledger Fabric network. You’ll later implement security at each level of blockchain app development, understanding how to secure various phases of a blockchain app using an example-based approach. You’ll gradually learn to securely implement and develop decentralized apps, and follow deployment best practices. Finally, you’ll explore the architectural components of Hyperledger Fabric, and how they can be configured to build secure private blockchain networks. By the end of this book, you’ll have learned blockchain security concepts and techniques that you can implement in real blockchain production environments. What you will learn Understand blockchain consensus algorithms and security assumptions Design secure distributed applications and smart contracts Understand how blockchains manage transactions and help to protect wallets and private keys Prevent potential security threats that can affect distributed ledger technologies (DLTs) and blockchains Use pentesting tools for assessing potential flaws in Dapps and smart contracts Assess privacy compliance issues and manage sensitive data with blockchain Who this book is for This book is for blockchain developers, security professionals, and Ethereum and Hyperledger developers who are looking to implement security in blockchain platforms and ensure secure data management using an example-driven approach. Basic knowledge of blockchain concepts will be beneficial.
This book gathers research contributions on recent advances in intelligent and distributed computing. A major focus is placed on new techniques and applications for several highlydemanded research directions: Internet of Things, Cloud Computing and Big Data, Data Mining and Machine Learning, Multi-agent and Service-Based Distributed Systems, Distributed Algorithms and Optimization, Modeling Operational Processes, Social Network Analysis and Inappropriate Content Counteraction, Cyber-Physical Security and Safety, Intelligent Distributed Decision Support Systems, Intelligent Human-Machine Interfaces, VisualAnalytics and others. The book represents the peer-reviewed proceedings of the 13thInternational Symposium on Intelligent Distributed Computing (IDC 2019), which was held in St. Petersburg, Russia, from October 7 to 9, 2019.
Blockchain technology is defined as a decentralized system of distributed registers that are used to record data transactions on multiple computers. The reason this technology has gained popularity is that you can put any digital asset or transaction in the blocking chain, the industry does not matter. Blockchain technology has infiltrated all areas of our lives, from manufacturing to healthcare and beyond. Cybersecurity is an industry that has been significantly affected by this technology and may be more so in the future. Blockchain for Cybersecurity and Privacy: Architectures, Challenges, and Applications is an invaluable resource to discover the blockchain applications for cybersecurity and privacy. The purpose of this book is to improve the awareness of readers about blockchain technology applications for cybersecurity and privacy. This book focuses on the fundamentals, architectures, and challenges of adopting blockchain for cybersecurity. Readers will discover different applications of blockchain for cybersecurity in IoT and healthcare. The book also includes some case studies of the blockchain for e-commerce online payment, retention payment system, and digital forensics. The book offers comprehensive coverage of the most essential topics, including: Blockchain architectures and challenges Blockchain threats and vulnerabilities Blockchain security and potential future use cases Blockchain for securing Internet of Things Blockchain for cybersecurity in healthcare Blockchain in facilitating payment system security and privacy This book comprises a number of state-of-the-art contributions from both scientists and practitioners working in the fields of blockchain technology and cybersecurity. It aspires to provide a relevant reference for students, researchers, engineers, and professionals working in this particular area or those interested in grasping its diverse facets and exploring the latest advances on the blockchain for cybersecurity and privacy.
Mastering Blockchain, Third Edition is the blockchain bible to equip you with extensive knowledge of distributed ledgers, cryptocurrencies, smart contracts, consensus algorithms, cryptography and blockchain platforms such as Ethereum, Bitcoin, and many more.
Few topics have gained as much attention in the world of information technology as blockchain and distributed ledger technologies (DLTs), making it almost inevitable that entities involved in the development and management of information technology (IT) systems unwrap the technology for themselves and give some consideration to its relevance in their context. The research and technology monitoring function of the European Union Agency for the Operational Management of Large-Scale IT Systems in the Area of Freedom, Security and Justice (eu-LISA) decided therefore to analyse whether blockchain, its functionalities and the use cases in other domains might have strategic and/or technical relevance for the Agency's future work. Blockchain has integrated several attractive functionalities - logging and timestamping of transactions, linked recording and digital signing, cryptography, access and permission, digital identity, consensus algorithms - under a single umbrella, making the technologies making the technologies more appealing. At the same time, it is often overlooked that many of those functionalities have been successfully introduced and applied in distributed computing and in e-governance frameworks prior to the surge in the development of blockchain. With a wider promotion, blockchain or distributed ledger infrastructures are nevertheless being intensively developed, supported and introduced to markets that until now have not been able to reach those functionalities for reasons of preference, accessibility or hesitancy. Admittedly, these technologies have great potential for disrupting data-sharing principles across industries and governments, though the current platforms and standards available are still far from being ready for widespread adoption in the public sector. The research undertaken aims to give a dedicated insight into the functionalities of the technologies and the relevant legislative environment, in order to provide discussion space for discovering the use cases in which the data exchange ecosystem built around cross-EU large-scale IT systems could benefit from a blockchain or distributed ledger approach. The presentation of possible use cases serves as encouragement to the industry and academia to include the large-scale IT systems domain in their further work on technology development. The discussion following those insights reflects on the technology's potential, and aims to support expectation management and industry aspirations. An overview of the EU-level legislative and policy environment suggests that application of blockchain or DLTs in the public sector within the EU, or for large-scale IT systems in the Justice and Home Affairs area, requires taking into account the existing and foreseen e-governance and interoperability structures. For systems managed by eu-LISA, the scope of dedicated regulations, implementing acts and accepted technical standards provides context for assessing the potential of new technologies.
This book provides the reader with the most up-to-date knowledge of blockchain in mainstream areas of security, trust, and privacy in the decentralized domain, which is timely and essential (this is due to the fact that the distributed and P2P applications is increasing day-by-day, and the attackers adopt new mechanisms to threaten the security and privacy of the users in those environments). This book also provides the technical information regarding blockchain-oriented software, applications, and tools required for the researcher and developer experts in both computing and software engineering to provide solutions and automated systems against current security, trust and privacy issues in the cyberspace. Cybersecurity, trust and privacy (CTP) are pressing needs for governments, businesses, and individuals, receiving the utmost priority for enforcement and improvement in almost any societies around the globe. Rapid advances, on the other hand, are being made in emerging blockchain technology with broadly diverse applications that promise to better meet business and individual needs. Blockchain as a promising infrastructural technology seems to have the potential to be leveraged in different aspects of cybersecurity promoting decentralized cyberinfrastructure. Blockchain characteristics such as decentralization, verifiability and immutability may revolve current cybersecurity mechanisms for ensuring the authenticity, reliability, and integrity of data. Almost any article on the blockchain points out that the cybersecurity (and its derivatives) could be revitalized if it is supported by blockchain technology. Yet, little is known about factors related to decisions to adopt this technology, and how it can systemically be put into use to remedy current CTP’s issues in the digital world. Topics of interest for this book include but not limited to: Blockchain-based authentication, authorization and accounting mechanisms Applications of blockchain technologies in digital forensic and threat hunting Blockchain-based threat intelligence and threat analytics techniques Formal specification of smart contracts Automated tools for outsmarting smart contracts Security and privacy aspects of blockchain technologies Vulnerabilities of smart contracts Blockchain for securing cyber infrastructure and internet of things networks Blockchain-based cybersecurity education systems This book provides information for security and privacy experts in all the areas of blockchain, cryptocurrency, cybersecurity, forensics, smart contracts, computer systems, computer networks, software engineering, applied artificial intelligence for computer security experts, big data analysts, and decentralized systems. Researchers, scientists and advanced level students working in computer systems, computer networks, artificial intelligence, big data will find this book useful as well.
Cryptographic Primitives in Blockchain Technology provides an introduction to the mathematical and cryptographic concepts behind blockchain technologies and shows how they are applied in blockchain-based systems.
Understand Cybersecurity fundamentals and protect your Blockchain systems for a scalable and secured automation KEY FEATURES Understand the fundamentals of Cryptography and Cybersecurity and the fundamentals of Blockchain and their role in securing the various facets of automation. Also understand threats to Smart contracts and Blockchain systems. Understand areas where blockchain and cybersecurity superimpose to create amazing problems to solve. A dedicated part of the book on Standards and Frameworks allows you to be industry-ready in information security practices to be followed in an organization. Learn the very lucrative areas of Smart Contract Security, Auditing, and Testing in Blockchain. Finish to build a career in cybersecurity and blockchain by being Industry 4.0 ready. DESCRIPTION As this decade comes to a closure, we are looking at, what we like to call, an Industry 4.0. This era is expected to see radical changes in the way we work and live, due to huge leaps and advancements with technologies such as Blockchain and Quantum Computing. This calls for the new age workforce to be industry-ready, which essentially means an understanding of the core fields of Cybersecurity, Blockchain, and Quantum Computing is becoming imperative. This book starts with a primer on the “Essentials of Cybersecurity”. This part allows the reader to get comfortable with the concepts of cybersecurity that are needed to gain a deeper understanding of the concepts to follow. The next part gives a similar primer on the “Essentials of Blockchain”. These two parts at the beginning of the book allow this book to be easily followed by beginners as well. The following parts delve into the concepts, where we see a “Superimposition of Cybersecurity and Blockchain”, and the concepts and situations where we may see and understand amazing problems that systems in the current world face day in and day out. This book puts immense emphasis on helping the reader know about the Standards and Frameworks needed to be put in place to make an organization work seamlessly. Towards the end, a part dedicated to Smart Contract Security, Auditing, and Testing in Blockchain provides knowledge about what is one of the most lucrative career options and has vital importance in the field of Blockchain. Conclusively, the book tries well to make the reader “Industry 4.0-ready”, helping them in traversing through the upcoming decade of significant career options. WHAT WILL YOU LEARN By the end of the book, you should be able to understand the gravity of the concepts involved in technologies like Blockchain and Cybersecurity, with an acute understanding of the areas, such as Quantum Computing, which affect the technologies. You will also know about the tools used in Smart Contract Auditing and Testing in Blockchain. You should be able to make a career in blockchain and associated technologies going forward. WHO THIS BOOK IS FOR This book is meant for everyone who wishes to build a career in blockchain and/or cybersecurity. The book doesn’t assume prior knowledge on any of the topics; hence a beginner from any diverse field might definitely give these technologies a try by reading this book. The book is divided into parts that take the reader seamlessly from beginner concepts to advanced practices prevalent in the industry. No prior programming experience is assumed either. Familiarity with the basic web technologies would help, though it is not mandatory to follow this book. Table of Contents Preface Introduction Why Did We Write This Book? Part 1. Essentials of Cryptography Introduction Chapter 1: Cryptography Techniques Introduction Key Length Key Management Algorithmic Principles Usage Chapter 2: Cryptography Protocols Introduction Basic Components of Cryptographic Protocols Security Applications of Cryptographic Protocols Categories of Cryptographic Protocols Chapter 3: Algorithms and Modes Introduction Behind the Scene Mathematics Block Ciphers Stream Ciphers One-Way Hash Functions Public-Key Algorithms Symmetric Key Distribution using Symmetric Encryption Symmetric Key Distribution using Asymmetric Encryption Distribution of Public Keys X.509 Certificates Public-Key Infrastructure (PKI) Cryptographic Attacks Key-Exchange Algorithms Elliptic Curve Cryptography (ECC) Digital Signatures With Encryption Data Encryption Standard (DES) Secure Hash Algorithm (SHA) Message Digest Algorithms (MD5) Rivest, Shamir, Adleman (RSA) Zero-Knowledge Proofs Elliptical Curve Digital Signature Algorithm (ECDSA) Probabilistic Encryption Quantum Cryptography Part 2. Essentials of Blockchain Introduction What is Blockchain? The Need for Decentralization Demystifying Disintermediation Principles in Blockchain Architectures Chapter 4: Introduction: Distributed Consensus & Consensus Mechanisms Proof of Work (PoW) Proof of Stake (PoS) Proof of Elapsed Time (PoET) Byzantine Fault Tolerance (BFT) and Variants Federated Byzantine Agreement Ripple Consensus Protocol Algorithm Stellar Consensus Protocol Delegated Proof of Stake (DPoS) Chapter 5: Types of Blockchain Public Blockchain Private Blockchain Federated or Permissioned Blockchain Chapter 6: Key Considerations for Blockchain Implementations Scalability Interoperability Sustainability Contracts Currency Application Chapter 7 : Strategic Roadmap for Digital Enterprise Adoption Convergence of Principles Legacy of Cypherpunks Digital Enterprise Use Cases Digital Transformation Perspective Decentralized Operating Models Prominent Trust Patterns Major Challenges and Constraints Chapter 8: Blockchain – The New Generation Tool for Cybersecurity Blockchain with Turin Complete State Machine Private and Consortium/Permissioned Blockchains Overview of Security Tools in Blockchain Vulnerabilities in Blockchain Security Challenges to the Growth of Blockchain Eco-system Part 3: The Superimposition of Blockchain and Cybersecurity Chapter 9: Cyberattack Prevention Strategies Evolution of Security Endpoint Detection and Response (EDR) Deception Technology Cyberthreat Intelligence (CTI) Deploying Blockchain-based DDoS Chapter 10: Blockchain-based Security Mechanisms Blockchain-based DNS Alternatives Public Key Cryptography PKI Components and Functions Decentralizing the PKI System Deploying Blockchain-based PKI Identity Mechanisms Multi-Factor Authentication with Blockchain Blockchain-based Interaction Model for Security Chapter 11: Threats for Blockchain systems Cyberthreats with Public and Permissioned Blockchains Major Potential Attacks on Blockchain Networks Chapter 12: Practical Implementations and Use Cases IBM ADEPT Platform Digital Identity as a Distributed Data Structure Cyber-liability Management: A Connected Car Use Case A Smart Home Security Implementation Use Case Chapter 13: Security in Popular Public Blockchain Networks Project in Discussion: Corda Point-to-Point TLS-encrypted Communications Security using Notary Trust Pluggable Consensus Mechanism Chapter 14: Cryptography as a Digital Labor for the Integration of Distributed Finance New Generation Payment Infrastructure Powering Secure Global Finance Libra JP Money Ripple Stellar Lumens Part 4: Standards and Frameworks Chapter 15: ISO 27001 ISO 27001 Introduction Scope Terms and Definitions Structure Information Security Policies Organization of Information Security Human Resource Security Asset Management Access Control Cryptography Physical and Environmental Security Operations Security Communications Security Supplier Relationships Information Security Incident Management Implementation of ISO 27001 in Organizations Chapter 16: NIST Introduction to NIST and HIPAA HIPAA Security Rule NIST and its role in Information Security A Framework for Managing Risk HIPAA Risk Assessment Requirements Part 5: Smart Contract Security, Auditing and Testing in Blockchain Chapter 17: Smart Contract Auditing Why is a Security Audit Necessary Types of Smart Contracts Smart Contract Vulnerabilities and Known Attacks Ownership Attack Re-entrancy Attack Underflow and Overflow Attacks Short Address Attack Storage Injection Vulnerability Risks in ICO Crowdfunding Smart Contracts An Ideal Audit Process Chapter 18: Testing in Blockchain Blockchain Attacks Network Attacks User Wallet Attacks Transaction Verification Mechanism Attacks Mining Pool Attacks Security Testing Phases in Blockchain Testing Framework Quality Issues in Blockchain Practices and Governing Mechanisms Popular Tools for Testing Part 6: Blockchain Power Automation for Industry 4.0 Chapter 19: Risks posed by the ‘Smart’ Economy Paradigms Zigbee Chain Reaction Attack Controlling Drones through Blockchain for Security & Auditing Securing Robots through Blockchain Secured Access and Management of Automobiles using Blockchain Chapter 20: Summary & Conclusion: A Safer and Secure World with Blockchain-based Solutions
Since its inception in late 2008, Bitcoin has enjoyed a rapid growth, both in value and in the number of transactions. Its success is mostly due to innovative use of a peer-to-peer network to implement all aspects of a currency's lifecycle - from creation to its transfer between users. Bitcoin offers cash-like transactions that are near-instantaneous and non-refundable, while at the same time allowing truly global transactions, processed at the same speed as local ones. It offers a public transaction history, enabling trustless auditability, and it introduces many new and innovative use-cases such as smart property, micropayments, contracts, and escrow transactions for dispute mediation. However, the same features that make Bitcoin attractive for its end-users are also its main limitations. Its decentralized nature limits the number of transactions and the speed at which transactions can be performed and confirmed. The problem with the slow confirmations is compounded with the semantics of the confirmations which are not final, requiring multiple confirmations and further delaying acceptance of a transaction. In the first part of the thesis we analyze whether the current Bitcoin protocol scales and what the scalability limits are. We find that Bitcoin does not scale, because its synchronization mechanism, the blockchain, limits the maximum rate of transactions the network can process. In order to address the scalability problem we propose Duplex Micropayment Channels, which increase the rate at which Bitcoin transfers can be performed by several orders of magnitude, by moving the transfers off the blockchain and using the blockchain solely for dispute mediation. Another form of scalability problem is the fact that more and more blockchain based applications are being created, eachwith their own small isolated blockchain, and vulnerable to attacks. We present PeerCensus, a subsystem that acts as a certification authority, manages peer identities in a peer-to-peer network and does not store application specific data in the blockchain. Using PeerCensus, any number of applications can share a single blockchain, decoupling confirmations from block generation rate and enhancing Bitcoin and similar systems with strong consistency. Being a relatively new technology, Bitcoin has a number of new security challenges and innovative properties. We analyze these properties and challenges in the second part of the thesis. The first novel property is that the transaction history, in the form of the blockchain, is public and accessible by anyone. Making use of the open nature of the blockchain, we were able to dispell claims by MtGox, once the world's largest Bitcoin exchange, that a bug in the Bitcoin protocol was used in a large scale attack to defraud them. We then use the blockchain to build a prototype of an audit protocol that allows a fiduciary, such as a Bitcoin exchange, to demonstrate that its assets cover its liabilities, without resorting to trusted third parties. Bitcoin also shifts the responsibility of managing and securing funds from a trusted third party to the end-user, which may not have the necessary tools to protect her funds. We show how a merchant may accept fast-payments, i.e., transactions without waiting for confirmations, with reasonable security against doublespending attacks by observing how transactions propagate in the network. Finally, we present a prototype of a secure device that stores private keys in tamper resitant storage and allows the user to independently verify a payment before authorizing it.
Understand the nuts and bolts of Blockchain, its different flavors with simple use cases, and cryptographic fundamentals. You will also learn some design considerations that can help you build custom solutions. Beginning Blockchain is a beginner’s guide to understanding the core concepts of Blockchain from a technical perspective. By learning the design constructs of different types of Blockchain, you will get a better understanding of building the best solution for specific use cases. The book covers the technical aspects of Blockchain technologies, cryptography, cryptocurrencies, and distributed consensus mechanisms. You will learn how these systems work and how to engineer them to design next-gen business solutions. What You'll Learn Get a detailed look at how cryptocurrencies work Understand the core technical components of Blockchain Build a secured Blockchain solution from cryptographic primitives Discover how to use different Blockchain platforms and their suitable use cases Know the current development status, scope, limitations, and future of Blockchain Who This Book Is For Software developers and architects, computer science graduates, entrepreneurs, and anyone wishing to dive deeper into blockchain fundamentals. A basic understanding of computer science, data structure, and algorithms is helpful.