How does blockchain work?

Blockchain does not store any of its information in a central location. Instead, the blockchain is copied and spread across a network of computers. Whenever a new block is added to the blockchain, every computer on the network updates its blockchain to reflect the change.

What is a blockchain database?

A blockchain has three central attributes. First, a blockchain database must be cryptographically secure. That means in order to access or add data on the database, you need two cryptographic keys: a public key, which is basically the address in the database, and the private key, which is a personal key that must be authenticated by the network.

What are cryptocurrency eclipse attacks?

While cryptocurrency eclipse attacks typically only affect a single user or a limited set of targets, repeated attacks can undermine trust within a blockchain network and eventually destroy a network without proper defenses.

What is a public blockchain?

A public blockchain, also known as an open or permissionless blockchain, is one where anybody can join the network freely and establish a node. Because of their open nature, these blockchains must be secured with cryptography and a consensus system like proof of work (PoW).