From the course: Building an Ethereum Blockchain App: 1 Introduction to Blockchain

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Public vs. private blockchains

Public vs. private blockchains - Ethereum Tutorial

From the course: Building an Ethereum Blockchain App: 1 Introduction to Blockchain

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Public vs. private blockchains

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- Throughout this course, we're going to be talking about public blockchains, but that's not the only type of blockchains out there. There's really a couple of different types, main types. There are public blockchains and private blockchains, and sometimes the public blockchains are called permissionless blockchains, where the private blockchains are called permissioned. Basically the difference between the two is in a public or permissionless blockchain, anybody can download the blockchain and participate as a node. There's no governing authority that says you can't. So anybody can participate. Anybody can see the data. All the nodes can freely access all of the blockchain data without restriction and all of the data is shared and available to all. So that means that if you don't encrypt the data in the block, everybody can see it. On the other side of the coin, there is the private or permissioned blockchain. This…

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