Blockchains —

In a nutshell, a blockchain is a shared, or distributed, ledger recording transactions and assets. The data is compiled through a continuous verification process that links all transactions into a large, decentralized "chain" of participants, who are linked across a network of peer-to-peer computers. 

While this data is publicly available, blockchains still embody a reliable form of transaction security because once the data has been set into the chain, it cannot be altered. This tamper-proof quality, or ‘immutability’, bypasses the need for ‘trusted’ third parties such as auditors, whose operations are by no means infallible.

Introduced with Bitcoin in 2007, blockchains are broadly understood as the building blocks of cryptocurrency systems. In allowing transactions to be tracked in a transparent, secure and decentralized manner, they do indeed play a pivotal role in cryptocurrency ecosystems, but they have all kinds of applications beyond that.

Aside from the proliferation of cryptocurrencies, blockchains also form the basis of decentralized finance (DeFi) applications, non-fungible tokens (NFTs), and smart contracts—sets of rules that enable transactions to be carried out automatically. This innovation has the potential to revolutionize the way we think about financial transactions, assets, and their privacy.

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