Bitcoin is a secure digital currency that is designed to be both secure and private. It uses a decentralized ledger, called the blockchain, to store transaction information. This ledger is distributed across a network of computers, making it nearly impossible for anyone to tamper with or alter the data.
For example, when a user sends a Bitcoin transaction, the transaction is verified and validated by the network of computers. This helps to ensure that the transaction is valid and that the user has the correct amount of funds in their wallet. The transaction is then added to the blockchain, making it public and permanent. This means that the transaction cannot be reversed or changed.