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

General data protection regulation (GDPR) considerations

General Data Protection Regulation (GDPR) ( is an EU law that defines how personal data is acquired, processed, and ultimately erased from a computing system. The definition of personal data in GDPR is quite broad—examples include name, email address, and IP address.

Blockchain, by design, creates an immutable, permanent, and replicated record of the data. A blockchain network based on Hyperledger Fabric will obviously encompass these three properties. Thus storing personal data on a blockchain network which cannot be deleted or modified can be challenging from the perspective of GDPR. Similarly, it is important to know who that personal data is shared with.

The channel and the channel private data feature of Hyperledger Fabric provides a mechanism for determining the entities with which data is shared. In the case of channel private data, the data is never stored on a blockchain, but its cryptographic hashes are...