Hash chain

A hash chain is a way of organizing data that uses mathematical code as a way of making sure information is protected and secure. Let's think about it like a chain. A chain is made of links that are all connected together. This works the same way with hash chains - mathematical codes (called "hashes") are connected in a chain and each link or code is dependent on the previous one. If the chain is broken, then it means the data has been tampered with. Hash chains are used to ensure the safety of information, like credit card payments, online banking, and more.