Distributed P2P Network Instead of relying on a single body to administer the chain, Blockchains rely on a decentralized peer-to-peer network that anyone can join. When a user enters this network, he will receive a complete copy of the blockchain. Each computer is referred to as a node.
This network's nodes come together to form a consensus. They have reached an agreement on which blocks are genuine and not. The network's nodes will reject blocks that have been tampered with.
To tamper with a blockchain successfully,
After you've completed all of these steps, everyone else will accept your tampered block. This is a near-impossible undertaking, and as a result, Blockchains are highly secure. We'll learn how a Blockchain transaction works next in this beginner's Blockchain development tutorial.