3. Nodes -the backbone of blockchain

Nodes are the backbone of every blockchain are reason this technology is decentralized. The future of data security lies in ability to delegate responsibility and trust in order to dilute power and minimize the possibility of human input. It empowers the output of a conglomeration of systems, known as nodes, by democratizing authentication process and delegating the power to "the group", or network. The blocks of data are stored on all the interconnected servers, better known as nodes, that allow the existence of a blockchain. Nodes come in all shapes and forms, they can be computers, servers, laptops and are continuously exchanging the latest blockchain data and contributing to the blockchain infrastructure. Every blockchain has its own minimum requirements to join its network by storing, sending, and preserving the blockchain data and thus becoming a partial stakeholder of the system.

A full node must contain a full copy of the transaction history of the blockchain and are responsible for the reliability of the stored data and together they evaluate and validate every block before it is added to the blockchain.

The quest to design and implements an effective decentralized network governance system that balances decentralization and security depends on the purpose and strategic priorities of a particular blockchain. Although there are many less popular consensuses mechanisms, it is only relevant to discuss the two main algorithms as they are the most used in today’s blockchain community: symmetric and asymmetric encryptions.

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