A blockchain is a distributed, decentralized, public ledger that records transactions on multiple computers. These transactions can be any movement of funds, goods, or secure data, and they are recorded in blocks that are linked and secured using cryptography. Each block contains a unique code called a "hash" that allows it to be securely linked to the previous block, creating a chain of blocks that cannot be altered or tampered with. This makes the blockchain a secure and transparent way to ...