Blockchain Definition: What You Need to Know

What is Blockchain

Each NFT has the ability to verify authenticity, past history and sole ownership of the piece of digital media. NFTs have become wildly popular because they offer a new wave of digital creators the ability to buy and sell their creations, while getting proper credit and a fair share of profits. Due to its secure and transparent nature, the technology is versatile to needs beyond one area of expertise. Industries covering energy, logistics, education and more are utilizing the benefits of blockchain every day. Making a change to any block earlier in the chain requires re-mining not just the block with the change, but all of the blocks that come after.

What is Blockchain

All digital assets, including cryptocurrencies, are based on blockchain technology. Decentralized finance (DeFi) is a group of applications in cryptocurrency or blockchain designed to replace current financial intermediaries with smart contract-based services. Like blockchain, DeFi applications are decentralized, meaning that anyone who has access to an application has control over any changes or additions made to it. This means that users potentially have more direct control over their money. The cryptocurrency industry made blockchain something of a household term; decentralized and traditional finance may soon follow crypto’s cue.


The entire blockchain is retained on this large network of computers, meaning that no one person has control over its history. That’s an important component, because it certifies everything that has happened in the chain prior, and it means that no one person can go back and change things. It makes the blockchain a public ledger that cannot be easily tampered with, giving it a built-in layer of protection that isn’t possible with a standard, centralized database of information.

  • Bitcoin is a perfect case study for the possible inefficiencies of blockchain.
  • And that your confidential blockchain records are shared only with network members to whom you granted access.
  • Once the nodes agree that the transaction is real, it is then added to a “block” (which is why it is called a blockchain) and is placed below the previous block of transactions in the ledger.
  • Even if a computer on the network were to make a computational mistake, the error would only be made to one copy of the blockchain and not be accepted by the rest of the network.
  • No participant can change or tamper with a transaction after it’s been recorded to the shared ledger.

Each transaction must be confirmed and recorded by a majority of the network nodes, which makes it vanishingly difficult to manipulate or alter information. This also prevents anyone from spending a Bitcoin more than once. Furthermore, transferring funds with centralized banks can be frustrating.

What is a blockchain?

Blockchain presents investors with exciting new opportunities, but it also comes with a number of risks. Today, the Ethereum blockchain lets developers create sophisticated programs that can communicate with one another through the blockchain itself. A company called Brave is already attempting this, with potential ramifications for the digital advertising industry.

What is Blockchain

This could be faster than sending money through a bank or other financial institution as the transactions can be verified more quickly and processed outside of normal business hours. On the public Bitcoin network, members mine for cryptocurrency by solving cryptographic equations to create new blocks. The system broadcasts each new transaction publicly to the network and shares it from node to node. Every ten minutes or so, miners collect these transactions into a new block and add them permanently to the blockchain, which acts like the definitive account book of Bitcoin.