Book Image

Foundations of Blockchain

By : Koshik Raj
Book Image

Foundations of Blockchain

By: Koshik Raj

Overview of this book

Blockchain technology is a combination of three popular concepts: cryptography, peer-to-peer networking, and game theory. This book is for anyone who wants to dive into blockchain from first principles and learn how decentralized applications and cryptocurrencies really work. This book begins with an overview of blockchain technology, including key definitions, its purposes and characteristics, so you can assess the full potential of blockchain. All essential aspects of cryptography are then presented, as the backbone of blockchain. For readers who want to study the underlying algorithms of blockchain, you’ll see Python implementations throughout. You’ll then learn how blockchain architecture can create decentralized applications. You’ll see how blockchain achieves decentralization through peer-to-peer networking, and how a simple blockchain can be built in a P2P network. You’ll learn how these elements can implement a cryptocurrency such as Bitcoin, and the wider applications of blockchain work through smart contracts. Blockchain optimization techniques, and blockchain security strategies are then presented. To complete this foundation, we consider blockchain applications in the financial and non-financial sectors, and also analyze the future of blockchain. A study of blockchain use cases includes supply chains, payment systems, crowdfunding, and DAOs, which rounds out your foundation in blockchain technology.
Table of Contents (14 chapters)

Blockchain Security

After studying most of the concepts and applications of blockchain technology, it's crucial to discuss its strengths and weaknesses in order to realize the level of security that is required. In this chapter, we will be addressing some of the significant challenges faced by blockchain technology. Along this journey, we'll also point out the possible attacks you can encounter in the blockchain network and how they can be prevented.

We'll be looking at the following topics in this chapter:

  • Transaction security model
  • Decentralized security model
  • Attacks on the blockchain, including:
    • Double-spend attacks
    • 51% attacks
    • Eclipse attacks
  • The threats presented by quantum computing

Blockchain technology was adopted in decentralized public networks because of the security the technology provides, including ensuring the integrity of the data stored in...