Blockchain

A blockchain is a shared digital record that many computers keep at the same time. Once information is added, it is very hard to change, which is what makes a blockchain hard to tamper with. This section explains blockchain from the start. It covers how a blockchain works, what smart contracts and nodes are, how network fees work, and where blockchains are used beyond money, including in India. Each lesson defines every term the first time it appears, so you can follow along with no prior knowledge.