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Cryptocurrency and Blockchain Dictionary

A complete list of crypto definitions

Cryptocurrency and blockchain glossary

Commonly used terms in the world of blockchain and cryptocurrency

Terms commonly used in the world of blockchain and cryptocurrency

Bitcoin

Bitcoin is a digital or virtual cryptocurrency created in 2009 that uses peer-to-peer technology to facilitate instant payments.

Other Important Terms

51% Attack

A ‘51% attack’ refers to a possible attack on a blockchain by a group of ‘miners’, who hold more than 50% of the hashrate. In such a situation the ‘miners’ have the possibility to deliberately not confirm transactions or to issue transactions twice (double-spend).

Altcoin

An altcoin is any cryptocurrency or token created after the Bitcoin was developed.

Blockchain

Blockchain is most simply defined as a decentralized, distributed ledger technology that records the provenance of a digital asset.

Double Spending

With digital currency, there is a risk that the holder could make a copy of the digital token and send it to a merchant or another party while retaining the original.

Block Reward

The block reward is the payment that is offered to the node that is securing the blockchain. In the case of Bitcoin, which is has a Proof-of-Work consensus algorithm, these would be the miners. The payment is in the form of the native cryptocurrency of that blockchain. The amount is a predetermined reward per block, but often that is supplemented with the fees that are paid for the transactions that block contains. For Bitcoin the current block rewards are cut in half every four years. This is called the ‘halvening’.


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