How does blockchain work?

A blockchain is a digital log of transactions that is kept by a network of computers and is difficult to hack or alter. Individuals can transact securely with one another without the need for an intermediary like as a government, bank, or other third party.
Cryptography is used to link the expanding list of records, known as blocks. Each transaction is independently validated, time-stamped, and contributed to a growing chain of data using peer-to-peer computer networks. Data cannot be changed once it has been recorded.
While Bitcoin, Ethereum, and other cryptocurrencies have gained popularity, blockchain technology has potential uses in legal contracts, property sales, medical records, and any other field that requires the authorization and recording of a series of activities or transactions.

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