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Blockchain

✨ The unfalsifiable registry

Blockchain is a technology that allows information to be stored and shared across a network of computers in a secure and organized way. It works by recording data in groups called blocks, which are linked together in a chronological chain. Each block contains information and a unique reference that helps protect the integrity of the entire chain.

Because copies of the blockchain can be stored on many computers in the network, changing recorded information becomes much more difficult without the agreement of the system participants. Blockchain was first widely known through cryptocurrencies such as Bitcoin, which use this technology to record digital transactions without relying on a central authority.

However, its applications extend beyond digital currencies. It can be used to track products in supply chains, verify documents, manage digital records, or support certain automated agreements called smart contracts.

Despite its potential, blockchain also faces challenges, including energy consumption for some systems, technical complexity, and questions about regulation and security. Careful design is necessary to ensure that blockchain solutions are reliable and useful.

💡 Did you know?

Do you know that no one really knows who invented blockchain? In 2008, a mysterious person using the pseudonym 'Satoshi Nakamoto' published the founding document for this technology. No one has ever met him in person, and we don't know if it's one person or a group of geniuses!

Why is it called a 'chain'? Because each block contains a secret code (a hash) that depends directly on the block before it. If you try to change a tiny digit in block number 1, its code changes. Consequently, it no longer matches block number 2, which no longer matches 3, and so on! The whole chain breaks immediately, and everyone sees the cheating.

How does Bitcoin mining work? Imagine that to validate a transaction, computers must solve an ultra-difficult mathematical puzzle. The first one to find the answer earns the right to add the block to the chain and receives a small reward in digital currency. This is why these computers are called 'miners': they work hard to extract value from the blockchain!