Blockchain is a digital ledger technology that underpins cryptocurrencies like Bitcoin. It is a decentralized system where transactions are recorded across a network of computers. Each transaction is added to a 'block' of data, which is then linked to the previous block, forming a 'chain'. This chain is secured through cryptography, making it nearly impossible to alter or tamper with the data. The main advantage of blockchain is its transparency and security, as every participant in the network can view the ledger, ensuring trust without the need for a central authority. It has potential applications beyond finance, including supply chain management, voting systems, and more, promising to bring about a new era of trust and efficiency in digital transactions.

That which does not kill us makes us stronger.