Blockchain
BeginnerA blockchain is a digital ledger that records transactions in a secure, transparent, and decentralised manner. Each block contains data and links to the previous one, forming a chain that cannot be altered without consensus. This technology removes the need for central authorities, making it ideal for use in cryptocurrencies like Bitcoin and Ethereum. Blockchain has expanded beyond finance into areas such as healthcare, supply chains, and voting systems. Its tamper-proof nature ensures trust and accountability, making it a core technology in modern digital infrastructure.