Book Image

Hands-On Blockchain with Hyperledger

By : Nitin Gaur, Luc Desrosiers, Venkatraman Ramakrishna, Petr Novotny, Salman A. Baset, Anthony O'Dowd
Book Image

Hands-On Blockchain with Hyperledger

By: Nitin Gaur, Luc Desrosiers, Venkatraman Ramakrishna, Petr Novotny, Salman A. Baset, Anthony O'Dowd

Overview of this book

Blockchain and Hyperledger technologies are hot topics today. Hyperledger Fabric and Hyperledger Composer are open source projects that help organizations create private, permissioned blockchain networks. These find application in finance, banking, supply chain, and IoT among several other sectors. This book will be an easy reference to explore and build blockchain networks using Hyperledger technologies. The book starts by outlining the evolution of blockchain, including an overview of relevant blockchain technologies. You will learn how to configure Hyperledger Fabric and become familiar with its architectural components. Using these components, you will learn to build private blockchain networks, along with the applications that connect to them. Starting from principles first, you’ll learn to design and launch a network, implement smart contracts in chaincode and much more. By the end of this book, you will be able to build and deploy your own decentralized applications, handling the key pain points encountered in the blockchain life cycle.
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Packt Upsell
Foreword
Contributors
Preface
Index

Hyperledger Fabric design goals impacting security


To understand the security of Hyperledger Fabric, it is important to state the key design goals that impact security:

  • Existing members should determine how to add new members in the network: The admission of new entities in the network must be agreed upon by existing entities in the network. This principle is at the foundation of creating a permissioned blockchain. Instead of allowing any entity to download software and connect to the network, network members must agree upon a policy to admit new members (e.g., by majority vote), which is then enforced by Hyperledger Fabric. Upon a successful vote, the digital credentials of a new member can be added to an existing network.
  • Existing members should determine how to update configuration/smart contract: Similar to the first item, any change in the configuration of the network or deploying or instantiating a smart contract has to be agreed upon by the network members. Taken together, the first...