opportunities. This is j ust the start. As Blockchain is more widely adopted,

it has the potential to radically reinvent the way companies and societies

operate, as radical a paradigm shift as happened with the launch of the

Internet.

Over the SEVEN Chapters in this book, you will learn the following:

Chapter 1 introduces Cryptography which is an essential element in

Blockchain in view of the confidentiality of messages when communicating

needs to be ensured so that no one other than the intended recipient of the

message can receive the message content. Cryptography introduces this

security and secrecy in message communication as also in the information

by concealing their contents.

Chapter 2 provides an understanding of Distributed Ledger Technology

and Blockchain. The DLT allows for transactions and data to be recorded,

shared, and synchronized across a distributed network of different network

participants. Blockchains employ cryptographic and algorithmic methods to

record and synchronize data across a network of different network

participants in an immutable manner.

Chapter 3 discusses the Consensus Models in Blockchain. Consensus is a

general agreement between a number of subj ects in a Blockchain network.

It is the process where the distributed nodes agree on the history and the

final state of the data on the ledger.

Chapter 4 describes Cryptocurrency which is electronic money created

with technology controlling its creation and protecting transactions, while

hiding the identity of its users. It is digital cash designed to be quicker,

cheaper, and more reliable than our regular government issued money.

Chapter 5 introduces Ethereum, Smart Contract, and dApps. Ethereum is a

decentralized, self-contained economy for transactional computation and

related data. It is an open Blockchain platform that lets anyone build and

use decentralized applications that run on Blockchain technology. Smart

Contract is the computer code that can facilitates the exchange of money,

content, property, shares, or anything of value. A dApp is an app where the

“server side” is j ust one or more well-known smart contracts that exist on

the Ethereum network, usually accompanied by some sort of user-friendly

front-end.