What is blockchain and what are its functions:

1- What is blockchain?

Blockchain is a distributed accounting technology that enables secure, transparent and tamper-proof transactions. It is a shared database maintained by a network of computers and is used to record information such as financial transactions, contracts, and ownership records.

2- How does blockchain work?

Blockchain works by creating a chain of blocks, each of which contains a timestamp, a transaction and a cryptographic hash of the previous block. This makes it very difficult to manipulate the data in the blockchain, as any changes would be immediately apparent.

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