© Santiago Palladino 2019
S. PalladinoEthereum for Web Developershttps://doi.org/10.1007/978-1-4842-5278-9_1

1. Blockchains

Santiago Palladino1 
Ciudad Autónoma de Buenos Aires, Argentina

We will begin our journey with a brief introduction to Ethereum and blockchain technology in general, starting with Bitcoin. We will explain what makes a blockchain and when it makes sense to use one. We will also cover some cryptography basics before we start and later provide an overview of decentralized application development before we implement our first one in Chapter 2.

A Refresher on Cryptography

Before we go into blockchains, we will go over two cryptography concepts that are key building blocks in most blockchains: hashes and public key cryptography. ...

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